You ______ take out the dog now,and you can'tdo it later.A haven't to B don't have to C have toD must

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You ______ take out the dog now,and you can'tdo it later.A haven't to B don't have to C have to
D must

C 你现在必须把狗带到外面去,一会就不行了.
根据后面的话显然前面是必须的意思,而且是客观上不得不这样做,所以用have to
不用must

D 你必须现在把狗带出去,并且你不能过一会儿在再出去。
是命令语气。