[单项选择]The project to clear up the polluted river _______by the end of next year.
A. will have been completed
B. will have completed
C. is being completed
D. has been completed

[单项选择]The project to clear up the polluted river _______by the end of next year.
A. will have been completed
B. will have completed
C. is being completed
D. has been completed

[单项选择]______ of the river has been polluted.
A. Second-three
B. Two-three
C. Two-third
D. Two-thirds

[单项选择]Perhaps we need to clear up these books to make _____ for our new students.
A. place
B. area
C. way
D. room

[单项选择]We'd like to clear up some points ( ) with the technical part of the contract.
A. connected
B. connect
C. connecting
D. being connected

[单项选择]Project schedule management is made up of six management processes including: activity definition, activity sequencing, ( 71) , and schedule control by order．
A. activity duration estimating, schedule developing, activity resource estimating
B. activity resource estimating, activity duration estimating, schedule development
C. schedule developing, activity resource estimating, activity duration estimating
D. activity resource estimating, schedule developing, activity duration estimating

[单项选择] A project requires a new server to be set up with the ability to automatically fail over its Ethernet connection to a second connection if a network failure occurs. Which of the following provides greatest resiliency?（）
A. Two switch ports will be needed on a switch, two Ethernet cables will be needed for the server each connecting to two different Ethernet cards, and one IP address will be needed.
B. Two switch ports will be needed on two different switches, two Ethernet cables will be needed for the server each connecting to two different Ethernet cards, and one IP address will be needed.
C. Two switch ports will be needed on two different switches, two Ethernet cables will be needed for the server each connecting to two different Ethernet cards, two different IP addresses will be needed.
D. One switch port will be needed on one switch, a splitter will be needed to split the connection, two Ethernet cables will be needed for the server each connecting to two different Ethernet cards, and two different IP addresses will be needed.

[单项选择]The project will have to be given up _______________ the government agrees to invest enough money.
A. unless
B. if
C. so that
D. until

[单项选择]The human beings have polluted the environment seriously. It is time the United Nations {{U}}must take{{/U}} some measures.
A. take
B. taking
C. to take
D. took

[单项选择]The water will be further polluted unless some measures ________.
A. will be taken
B. are taken
C. were taken
D. had been taken

[单项选择]Man cannot prevent the world from being polluted because_________.
A. people use too many man-made materials
B. the pupulation of the world is increasing faster
C. we are producing more cars, trucks and buses
D. we have more and more industry.

[单项选择]The Yellow River is（）river in China.
A. the longest
B. the second longest
C. second longer
D. the second longer

[单项选择]Part of the lake has been polluted. You can see the water is covered with _________ oil.
A. a coat of
B. a story of
C. a film of
D. a pad of