單項選擇題

I stopped（）last year.

A.smoking
B.smoke
C.to smoke
D.smoked

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單項選擇題

The picture is pleasant（）

A.to look at
B.to look
C.to be looked at
D.looking at

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Please stop（）.It cannot help the situation.

A.to shout
B.shouting
C.to speak
D.speaking