Future agriculture should depend on high technology __________ traditional methods.

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• 1–It's a long time ___ I last saw you. --Yes, and it will be two months ______ we can meet again.

  A.before; since

  B.when; before

  C.since; when

  D.since ; before

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• 2Find ways to praise your children often,_____ you'll find they will open their hearts to you.

  A.till

  B.or

  C.and

  D.but

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• 3It is an unfair thing for our students ____ have devoted 12 years to preparing the exam to be beaten by those_____ use illegal methods..

  A.who; 不填

  B.不填，who

  C.who，who

  D.不填，不填

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• 4It was a nice meal, _______a little expensive.

  A.though

  B.whether

  C.as

  D.since

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• 5The head of the company promised to deal with matters of this sort _____ he returned to his office．

  A.until

  B.while

  C.by the time

  D.the moment

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• 6Hurry up, ________you'll miss the bus.

  A.and

  B.while

  C.but

  D.or

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• 7 _____ a strange plant! I've never seen it before.                  

  A.Which

  B.What

  C.How

  D.Whether

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• 8one Friday ,we were packing to leave for a weekend  away  ______ my daughter beard cries for help. 

  A.after

  B.while

  C.since

  D.when

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• 9______ both sides accept these terms will everlasting peace be established in this region.

  A.Unless

  B.As long as

  C.If only

  D.Only if

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• 10_________ all of them are strong candidates, only one will be chosen for the post.                                 

  A.Since

  B.While

  C.If

  D.As

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