It Tom that parked the car here, as he is the only one with a car. A．may beB．might have beenC．must have beenD．could be 题目和参考答案——青夏教育精英家教网—

题目内容

It __________ Tom that parked the car here, as he is the only one with a car.

A．may be

B．might have been

C．must have been

D．could be

试题分析：考查推测，might have done表示对过去事情不肯定推测； must have done表示对过去事情肯定推测；could have done表示表示过去未实现的动作，由后面的句子as he is the only one with a car可以知道是肯定推测，所以选C
点评：推测是常考内容，要知道它们表示的是什么意思，遇到此类题时，就很容易做出正确选择

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A．didn’t recognize; hadn’t called	B．didn’t recognize; didn’t call
C．haven’t recognized; didn’t call	D．wouldn’t have recognized; hadn’t called

— Is it convenient if I call you up at 9 tomorrow morning?
— I am afraid not. I _____ a group of visiting teachers then.

Helen ________ her keys in the office so she had to wait until her husband ______ home.

A．has left; comes

B．left; had come

C．had left; came

D．had left; would come

Since the project has been ___ on well, you must ___ it on until it is completed.

A．carrying, carry	B．going, carry
C．going, go	D．carrying, go

---Where’s the little elephant?
---It’s said it ___ in the hospital.

A．was examined	B．will be examined
C．is being examined	D．has been examined

The Diaoyu islands, in the East China Sea between China and Japan, _______ to China since ancient times.

—Why does the lake smell terrible?
—Because large quantities of water______.

A．have polluted	B．is being polluted
C．has been polluted	D．have been polluted

—Remember how we met for the first time, Dick?
—Of course I do．You ______ to the teachers’ office hurriedly and ______ me．

A．had walked; weren't noticing	B．were walking; didn't notice
C．had been Walking; noticed	D．walked; had noticed

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