Let's make ________ a rule that we take turns at cleaning our dormitory.

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We are polluting water ________ an alarming pace.

[　　]

________ we succeed in making more water available to us, we must still do something about water pollution.

[　　]

Too much water ________ because we are using old ways of watering our plants.

[　　]

If I ________ more about the earth in the past, I would have made different choices about what to do and what to buy.

[　　]

The captain kept calm in the terrible storm, otherwise the accident ________.

[　　]

A．couldn't be prevented

B．mustn't have prevented

C．wouldn't have been prevented

D．shouldn't prevent

－Do you want him to lend you some money?

－I wish he ________.

[　　]

________ it rain tomorrow, we would have to put off the visit to the Yangpu Bridge.

[　　]

－I missed the lecture last night.

－Oh, what a pity. I wish ________.

[　　]

－If he ________, he ________ that food.

－Luckily he was sent to the hospital immediately.

[　　]

A．was warned; would not take

B．had been warned; would not have taken

C．would be warned; had not taken

D．would have been warned; had not taken