[单项选择]I tried to call you lost night but your line was______.
A. occupied
B. taken
C. connected
D. engaged

[单项选择]-- You haven't lost your key, have you -- ______.

[单项选择]Which number would you call if your friends were suddenly ill
A. (212)344～0996
B. (212)363～7620
C. (212)363～3260
D. (212)269～5755

[单项选择]—You seem to have lost your way．______
—I'm looking for Wangfujing Street．
A. What for
B. Need help
C. Why so
D. Where to

[单项选择]A: You have a call on line one. B: ______.

[单项选择]"Does your family call you very often" "Yes, my mother calls about once a week and ."______.
A. so my brother does
B. so does my brother
C. my brother does so
D. my brother so does

[单项选择]—Peter，I lost your pen at school．I suppose I should pay for it． —Oh，______．It was an old pen anyway．

[单项选择]I lost the pen you had bought me for my birthday. If only I ______ it.
A. not lost
B. lose
C. had not lost
D. should not lost

[单项选择]______ you call me to say you're not coming, I'll see you at the theatre.
A. Though
B. Whether
C. Until
D. Unless

[单项选择]Excuse me. If your call' s not too urgent, do you mind ______ mine first
A. I make
B. if I make
C. me to make
D. that I make

[单项选择]Excuse me. If your call's not too urgent, do you mind ______ mine first
A. I make
B. if I make
C. me to make
D. that I make

[单项选择]—How often do you drop your e-pal a line — ______ , but usually once a week.
A. As usual
B. It depends
C. Generally speaking
D. Have no idea

[单项选择] You have lost all your online redo logs. As a result， your database has crashed. You have tried to restart the database and clear the online redo log files， but when you try to open the database you get the following error.   SQL> startup ORACLE instance started.  Total System Global Area 167395328 bytes Fixed Size 1298612 bytes Variable Size 142610252 bytes Database Buffers 20971520 bytes Redo Buffers 2514944 bytes Database mounted.  ORA-00313： open failed for members of log group 2 of thread 1 ORA-00312： online log 2 thread 1： ，，/oracle01/oradata/orcl/redo02a.log ORA-27037： unable to obtain file status Linux Error： 2： No such file or directory Additional information： 3  ORA-00312： online log 2 thread 1： ，，/oracle01/oradata/orcl/redo02.log ORA-27037： unable to obtain file status Linux Error： 2： No such file or directory Additional information： 3  SQL> alter database clear logfile group 2； alter database clear logfile group 2 * ERROR at line 1：  ORA-01624： log 2 needed for crash recovery of instance orcl （thread 1） ORA-00312： online log 2 thread 1： ，，/oracle01/oradata/orcl/redo02.log ORA-00312： online log 2 thread 1： ，，/oracle01/oradata/orcl/redo02a.log   What steps must you take to resolve the error？（） a. Issue the recover database redo logs command.  b. Issue the Startup Mount command to mount the database.  c. Restore the last full database backup.  d. Perform a point-in-time recovery， applying all archived redo logs that are available.  e. Restore all archived redo logs generated during and after the last full database backup.  f. Open the database using the alter database open resetlogs command.  g. Issue the alter database open command.
A. b， a， f
B. e， b， a， f
C. e， b， a， g
D. b， a， g
E. c， e， b， d， f

[单项选择] You have lost all your database control files. To recover them， you are going to use the results of the alter database backup controlfile to trace command. Your datafiles and your online redo logs are all intact.  Which of the following is true regarding your recovery？（）  
A.  You will need to open the database with the resetlogs command.
B.  All you need to do is execute the trace file from SQL*Plus and it will perform the recovery for you.
C.  You will use the resetlogs version of the create controlfile command.
D.  You will use the noresetlogs version of the create controlfile command.
E.  You will use the trace file to create a backup control file， and then you will recover the database with the recover database using backup controlfile command

[单项选择] You have lost all your SYSTEM tablespace datafiles （system_01.dbf and system_02.dbf） nd the database has crashed.  What would be the appropriate order of operations to correct the situation？（）   a. Mount the database with the startup mount command.  b. Take the SYSTEM datafile offline with the alter database command.  c. Restore the SYSTEM_01.dbf datafile from backup media with the required archived redo logs.  d. Restore all SYSTEM tablespace-related datafiles from backup media. e. Issue the recover tablespace SYSTEM command.  f. Issue the recover datafile SYSTEM_01.dbf command.  g. Open the database with the alter database open command.  h. Open the database with the alter database open resetlogs command.
A. a， c， f， g
B. b， d， e， h
C. a， b， c， f， g
D. d， a， e， g
E. b， c， f， e， g

[单项选择] You have lost all your RMAN backup set pieces due to a disk failure. Unfortunately， you have an automated cross-check script that also does a delete expired backupset command. You have restored all the backup set pieces from tape.  What command would you use to get those backup set pieces registered in the recovery catalog and the control file of the database again？（）  
A.  register database
B.  recover catalog
C.  load backupset
D.  synch metadata
E.  catalog start with

[单项选择]If you lost your entire database，including the database spfile，control files，online redo logs，and database datafiles，what kind of recovery would be required with RMAN？（）  
A.  Complete database recovery.
B.  Incomplete database recovery.
C.  Approximate database recovery.
D.  Archived database recovery.
E.  The database could not be recovered with RMAN.