[单项选择]All female employees are advised to be （） when entering and leaving the building after-hours due to a recent spate of attacks.
A. caution
B. cautious
C. cautiously
D. cautiousness

[单项选择]

Personal interviewing is most effective when all the people to be interviewed are located in a relatively small geographical area. Otherwise, the time and expense spent in travelling from one person to another makes this type of interviewing economically impractical. Personal inter viewing is usually used when the information needed is too complex to be gathered by another technique. For example, a problem being studied may require the interviewer to probe beyond the more superficial answers that might be obtained with another method.
It is sometimes assumed that personal interviewing is the most accurate of all survey re search techniques. Although personal interviewing may be accurate in many cases, human errors may prevent a researcher from obtaining valid results. Questions perceived by the interview wee as an invasion of privacy or threatening in any way will probably produce false of partially true answers. Also, since the interviewer must interpret the respo
A. the interviewer can ask the interviewee questions again in different ways
B. the interviewer can ask the interviewee some personal questions
C. the initial question do not produce the information desired
D. no one is present to clarify questions

[单项选择]It can be concluded from the passage that when all the people to be interviewed are located in a relatively big geographical area ______.
A. personal interviewing is most effective
B. personal interviewing is economically impractical
C. personal interviewing is the only technique to get information
D. telephone interviewing may not be used

[单项选择]Only when all the work was done（）home.
A. the young teacher returned
B. did the young teacher return
C. returned the young teacher
D. the young teacher did return

[单项选择]

When all the people had assembled, the king, surrounded by his court, (21) a signal. Then a door beneath him opened, and the accused man stepped out into the arena. Directly opposite him were two doors, exactly (22) and side by side. It was the duty and the privilege of the person on trial to walk directly to these (23) and open one of them. He (24) open either door he pleased; he was subject to no guidance or influence but that of impartial and incorruptible chance. If he opened the one, there came out of it a hungry tiger, the fiercest and most cruel that could be found, which (25) sprang upon him and tore him to pieces as a punishment for his guilt. But, if the accused person opened the other door, out of it came a (26) lady, and to this lady he was immediately married, as a reward of his innocence. This was the (27) method of administering justice. Its perfect fairness is obvious. The criminal could (28) know out of whi
A. give
B. gives
C. gave
D. given