When the children are busy playing their games．They had better be _____ .

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• 1--- Another cup of coffee? ---No, thanks. I think I'd better _______ for the station immediately.

  A.set up

  B.set about

  C.set down

  D.set off

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• 2Students are encouraged to _________ the design competition for robots at the university.

  A.take part

  B.operate

  C.join to

  D.participate in

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• 3The supermarkets ________ open until late every evening, which provides us much convenience.

  A.prove

  B.maintain

  C.continue

  D.remain

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• 4All his friends and relatives came to ______ him on his daughter's being admitted to Qin Hua University.

  A.celebrate

  B.congratulate

  C.memorize

  D.respect

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• 5After a 3-month drought, the rain _______ a good crop this year.

  A.brought

  B.managed

  C.made

  D.guaranteed

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• 6Color - blind people often find it difficult to ______ between red and green.

  A.distinguish

  B.compare

  C.contrast

  D.distribute

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• 7The joke the naughty boy _______ his teacher made many people angry．

  A.made on

  B.played on

  C.played to

  D.made to

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• 8One day I _______ a newspaper article about the retirement of an English professor at a nearby state college.

  A.came across

  B.came about

  C.came over

  D.came out

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• 9I've been playing the piano for four hours and I am ________ it.

  A.tired of

  B.tired in

  C.tired on

  D.tired through

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• 10Healthy diet should ________ some nutrition (营养素), ________ sugar, protein and calcium.

  A.contain; included

  B.containing; including

  C.be contained; included

  D.contain; including

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