2012大学英语四级时态真题训练（5）

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2012大学英语四级时态真题训练（5）
1.While people may refer to television for up-to-the-minute news, it is unlikely that
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4 F# Z, t" n# k  r    television______ the newspaper completely. (95.6/48)
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    A. will replace   B. have replaced   C. replace    D. replaced
- c- b$ P) y$ m  P1 ^    2.The fifth generation computers, with artificial intelligence, _______ and perfected now.
   
    (96.1/21)
  G/ ^- ^8 B, R3 t* i4 t- Y   
( T0 j; U0 L% M9 `# L    A. developed  B. have developed   C. are being developed   D. will have been developed
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    3.It’s reported that by the end of this month the output of cement in the factory_______ by about
   
    10%. (96.1/39)
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    A. will have risen   B. has risen    C. will be rising    D. has been rising
   
    4.Sir Dennis, who is 78, has made it known that much of his collection ______¬ to the nation.
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3 w% F/ y5 g" A    (96.6/24)wｗw.ExamＷ.CoM
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, S' a0 t1 N) Y. @8 W: _9 C    A. has left   B. is to leave   C. leaves   D. is to be left
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) G: d6 p' \7 ~7 i. R    5.Before the first nonstop flight made in 1949, it_______ necessary for all planes to land for
   
1 a; [- t4 Q+ @4 n/ [' Y* F    refueling. (96.6/25)
   
    A. would be   B. has been   C. had been    D. would have been
答案：ACADC