653.He was busy writing a story,only _____ once in a while to smoke a cigarette.
A.to stop
B.stopping
C.to have stopped
D.having stopped
654.Lucy's new job paid twice as much as she had made ______ in the restaurant.
A.working
B.work
C.to work
D.worked
653.答案是B;此处现在分词短语作伴随状语，注意:only to do sth.则表示出乎意料的结果。
654.答案是A;working in the restaurant为现在分词短语在句中作时间状语，相当于when she was working…
