(2013·安徽，21)From space, the earth looks blue.This is ________about seventyone percent of its surface is covered by water.
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Good food, good sleep, no exercise. That's ________ he gained weight.
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—Don't you think it necessary that he ________ to Miami but to New York?—I agree, but the problem is ________ he has refused to.
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will not be sent；that
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should not send；what
Xiao Ming practises his spoken English once there is a chance and that is_________ it takes to live his dream to be a good guide．
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What really worries us is ______ the explorers can accurately locate themselves with the device in case of bad weather.
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--- I prefer to stay at home on weekends. ---That is ______ I disagree. You should go out and breathe some fresh air.
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