题目内容

It's necessary for you _____ the car when you do not use it.

[     ]

A. lock
B. to lock
C. locking
D. locked
B
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He opened his mouth as if ____.
[     ]
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B. to speaking
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There is nothing more I can try _____ you to stay, so I wish you good luck.

[     ]

A. persuading
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[     ]

A. Competing
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[     ]

A. Having made
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[     ]

A. to clean
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C. cleaned
D. being cleaned
More natural resources should be made use of _______ the increasing need of energy.

[     ]

A. meeting
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_____ the project as planned, we'll have to work two more hours a day.

[     ]

A. Completing
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C. Completed
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Although the huge engine, as tall as 25 meters, is heavy _____, it is powerful and works well.
[     ]
A. carried
B. to be carried
C. to carry
D. being exposed

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