Smoking pollutes air. You ______ smoke here.
A．won’tB．can’tC．ought not toD．needn’t
C

試題分析：考查情態(tài)動詞。A不會；B不可能，不能；C不應該；D不需要；句意：抽煙污染空氣，你不應該在這里抽煙。Ought to=should應該。故C正確。
點評：ought to=should應該；表示一種委婉的語氣。Will表示百分百的肯定。
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