Every possible means ________ to prevent the air pollution, but the sky is still - 高中英语试题 - 超级试练试题库

题目

题型：同步题难度：来源：

Every possible means ________ to prevent the air pollution, but the sky is still not clear. [     ]
A. is used
B. are used
C. has been used
D. have been used

答案

核心考点

试题【Every possible means ________ to prevent the air pollution, but the sky is still】；主要考察你对现在完成时等知识点的理解。[详细]

举一反三

— What have they made up their minds to do during the summer vocation?
— They ______ to cycle around the country on their own.    [     ]
A. are determined
B. are decided
C. have determined
D. have been decided

题型：同步题难度：| 查看答案

This is the first time that I_________ at the meeting.[     ]
A. had spoken
B. have spoken
C. am
D. was

题型：同步题难度：| 查看答案

It"s the second time you _______ late this week.[      ]
A. arrive
B. arrived
C. have arrived
D. had arrived

题型：广东省同步题难度：| 查看答案

— You shouldn"t have talked back to our teacher like that. It was awfully impolite.
— You are right. I ______ crazy at that moment.[      ]
A. must be
B. could have been
C. must have been
D. should have been.

题型：安徽省月考题难度：| 查看答案

By the time he realizes he _____ a mistake, it" ll be too late for him to change his mind.     [     ]
A. makes
B. made
C. has made
D. had made

题型：河北省期末题难度：| 查看答案

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