27. He was busy writing a story, only ________ once in a while to smoke a cigarette.(A)to stop (B)st

問題詳情

27. 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

答案：B
難度：適中0.5
統計：A(0),B(0),C(0),D(0),E(0)