He was busing writing a story,only___once ina while to smoke

He was busing writing a story,only___once ina while to smoke a cigarette.
A.to stop
B.stopping
C.to have stopped
D.haing stopped
谁能解析一下?
wgb_1031 1年前 已收到1个回答 举报

一切变得简单 幼苗

共回答了27个问题采纳率:88.9% 举报

是B吧
因为要考虑到parallel structure,前面用writing,后面也要跟ing,所以是stopping

1年前

5
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