Do we _____ do exercises every day?A need B have to C must D should

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Do we _____ do exercises every day?A need B have to C must D should
Do we _____ do exercises every day?A need B have to C must D should

Do we _____ do exercises every day?A need B have to C must D should
B
只有have to 可以和助动词Do 连用.
如果选A ,可以说：Do we need to do exercises every day?
C, D 不能和do 连用.

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B
注：A作实义动词，后接TO DO； C与D 的疑问句不能加DO

选 B 意为“我们必须第天做操吗？” 前面有do，说明后面的一定得是实义动词原形，而且还得带to，因为do exercises 是动词短语，中间得用 to 连接。

B
解析：这句还原成陈述句为：we _____ do exercises every day。选A,C,D则问句分别为Need/Must/Should we do exercises every day?只有B 助动词为do ,答案是Do we have to do exercises every day?

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