Most whales must come up for air after several minutes, ______ a few can stay under water for an hour or more.   

试卷相关题目

• 1One day Chuck is ______ a flight ______ the Pacific Ocean suddenly ______ his plane crashes.

  A.in; over; while

  B.on; across; when

  C.with; through; then

  D.on; across; as

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• 2Walk faster, ________ you may catch up with your friends ahead.

  A.or

  B.but

  C.and

  D.yet

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• 3______, I believe, and you will find the boy is very outgoing.

  A.Having a talk with the student

  B.One talk with the student

  C.Given a talk with the student

  D.If you have a talk with the student

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• 4There are many pavilions in Shanghai World Expo. Some like visiting European pavilions, ________ others enjoy visiting Asian pavilions.

  A.or

  B.for

  C.while

  D.so

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• 5The medicine works more effectively _______ you drink some hot water after taking it .

  A.as

  B.until

  C.although

  D.if

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• 6Stand over there____you'll be able to see it better.   

  A.or

  B.while

  C.but

  D.and

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• 7They were walking along the shore _______ a huge wave appeared out of nowhere, sweeping them out to se

  A.A.as

  B.while

  C.when

  D.though

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• 8He had hardly finished his meal ________ a familiar voice came to his ears.

  A.why

  B.where

  C.when

  D.while

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• 9I was fast asleep _____ suddenly my bed began shaking and I heard a strange sound, like a railway trainpassing my window.

  A.before

  B.when

  C.while

  D.after

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• 10The days are fast coming ______ watching films by using the web is a routine.

  A.that

  B.and

  C.when

  D.if

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