However, no one ________ any life in space yet.


  1. A.
    has been discovered
  2. B.
    discovered
  3. C.
    has discovered
  4. D.
    have discovered
C
點(diǎn)撥：此題考查no one在現(xiàn)在完成時態(tài)中作主語時，助動詞應(yīng)該用has，選項B和D不符合這一用法，A項是被動語態(tài)，只可選C。
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任務(wù)型閱讀（本題共10分，每空1分）

先閱讀（A）、（B ）兩篇短文，然后根據(jù)題目要求及所給語境完成下列四項任務(wù)。

（A）

party  get  communication  use  general

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(B)

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