If you really want yourself to be in good health, you must ______ always ______ so much.

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问题 If you really want yourself to be in good health, you must ______ always ______ so much.

选项 A、not; be smoking
B、not; have smoked
C、not; to smoke
D、be not; smoking

答案A

解析 情态动词。must not always be doing sth.表示“不要老是做某事”,带有埋怨、指责、反感等感情色彩。
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