Question

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

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

Answer 1

A

mustn’t be doing与always连用，表示“一定不要总是在做……”，含有“埋怨、不满”等感情色彩。