问题
选择题
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
答案:B
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