If someone is in the United States for good, it means he is there ______ .

多选题

If someone is in the United States for good, it means he is there ______ .

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多选题

If?you?see?a?doctor?leaving?a?house,?you?may?________?that?someone?in?the?house?is?ill.（?）

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单选题

If _____properly, time is the money in the bank.

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单选题

In the United States it is（ ）not to look at someone who is talking to you.

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单选题

If the fuel level is high enough in the surge tank, fuel will drain out of the vents coop.

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