_______ rise in carbon dioxide is causing _______ steady increase in global warming.

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• 1People are living in_______ world where mouse clicks rule our life, so online searches have become_______ must.

  A.the; /

  B./; a

  C.a; a

  D.a; the

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• 2In China, _____ car is increasingly becoming ________ popular means of transportation．

  A.the; a

  B.a, 不填

  C.the, 不填

  D.a; the,

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• 3Most workers are in _________ habit of having _________ quick lunch in the company every day.

  A.the; 不填

  B.the; a

  C.a; a

  D.a; 不填

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• 4Being able to afford ______ drink would be ______ comfort in those tough times.

  A.the; the

  B.a; a

  C.a; /

  D./; a

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• 5— I heard that one of the middle school students died from overwork. — Yes, ______ news came as ______ great shock.

  A.the; /

  B.the; a

  C./; a

  D./; /

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• 6----Have you seen＿＿＿＿pen﹖I left it here this morning. -----Is it＿＿＿＿black one﹖I think I saw it somewhere.

  A.a；the

  B.the；the

  C.the；a

  D.a；a

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• 7By tradition, on __________ Independence Day, Americans play sports, have barbecues and hold parties throughout __________ day to celebrate this festival.

  A.the, the

  B.a, the

  C.the, a

  D./, the

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• 8The NBA is _____ organization of professional（职业的） basketball players in the US

  A.A.a

  B.an

  C.the

  D./

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• 9As _______teacher，you must believe that you can make ________difference to the lives of your students.

  A.a；/

  B.a；a　　　

  C./；/　　　　

  D./；a

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• 10Only if you put ______ sun there did the movements of the other planets in ______ sky make sense.

  A.the; 不填

  B.the; the

  C.不填; the

  D.a; the

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