The engine smoke and steam. A. gives upB. gives inC. gives awayD. gives off

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A. gives up
B. gives in
C. gives away
(答案→)D. gives off
解析：本题的含义是发动机散发出烟雾和蒸汽，give off表示散发的意思，符合本题的含义，故本题选D。