They would go out even if it ________ tomorrow.

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—We could have walked to the doctor's; it was so near.

—Yes. A ride ________ at all necessary.

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There was a lot of fun at yesterday's party. You _____ come, but why didn't you?

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________ for the free tickets, I would not have gone to the films so often.

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Without the air to hold some of the sun's heat, the earth at night ________, too cold for us to live.

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When a stick is partly in a glass of water, it looks as though it ________.

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Your advice ________ till next week is reasonable.

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I told Sally Mr Brown's address, but perhaps I ________ for her.

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A．had to write it out

B．must have written it out

C．should have written it out

D．ought to writer it out

—If Mr. Black ________, he ________ that food.

—Luckily he was sent to the hospital immediately.

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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

But for electricity, human life ________ so easy today.

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