- How long do you think it will be China sends a manned spaceship to the moon? - Perhaps two o——青夏教育精英家教网——

— How long do you think it will be _____ China sends a manned spaceship to the moon?
— Perhaps two or three years.

A. when
B. until
C. that
D. before

He was about halfway through his meal _____ a familiar voice came to his ears.

A. why
B. where
C. when
D. while

We thought there were 35 students in the dining hall, ______, in fact, there were 40.

A. while
B. whether
C. what
D. which

John thinks it won't be long _____ he is ready for his new job.

A. when
B. after
C. before
D. since

His plan was such a good one _____ we all agreed to accept it.

A. so
B. and
C. that
D. as

In time of serious accidents _____ we know some basic things about first aid, we can save lives. 　　

A. whether
B. until　　
C. if
D. unless

The field research will take Joan and Paul about five months; it will be a long time _____ we meet them again.

[ ]

A. after
B. before
C. since
D. when

— Our holiday cost a lot of money.
— Did it? Well, that doesn't matter _____ you enjoyed yourselves.

A. as long as
B. unless
C. as soon as
D. though

Having checked the doors were closed, and _____ all the lights were off, the boy opened the door to his
bedroom.

A. why
B. that
C. when
D. where

Most birds find it safe to sleep in the trees, but _____ they have eggs or young chicks, they don't use a nest.

A. why
B. how
C. unless
D. where

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