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【简答题】
Why did the Federal Aviation Authority require the black boxes be painted orange or yellow? A) To distinguish them from the colour of the plane. B) To conform. to international standards. C) To make them easily identifiable. D) To caution people to handle them with care.
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反馈参考答案：
举一反三
【单选题】Look! The light in the room is still on. Mr. Liu at work.
A.
must
B.
can’t be
C.
must be
D.
have to be
【单选题】Look! Liu Mei's name is on the bag. It_______hers. [ ]
A.
was
B.
has been
C.
must be
D.
will be
【简答题】We must do the experiment carefully__________Miss Liu told us. A．what B．since C．as D．while
【简答题】Most vegetables, to (enjoy) ______ in their full deliciousness, must be picked fresh and cooked at once.
【单选题】—— Excuse me. You must be Mr. Liu Hua from China? —— ___________________
A.
Yes, nice to meet you.
B.
How do you do?
C.
Thank you.
【单选题】Listen to that laughter! They______themselves.
A.
must enjoy
B.
must be enjoying
C.
may be enjoying
D.
can be enjoying
【单选题】All men are created _________and we must enjoy _________right and chances in everything.
A.
fair;same
B.
similarly;fair
C.
equal;equal
D.
fairly;equal
相关题目：
【单选题】Look! Liu Mei's name is on the bag. It_______hers. [ ]
A.
was
B.
has been
C.
must be
D.
will be
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