- 试题详情及答案解析
- finishing his homework, he went to play basketball with his classmates.
| A．In | B．Upon |
| C．As soon as | D．At |
- 答案：B
- 试题分析：句意：他一完成家庭作业，就和同学一起打篮球了。A. In +时间段，表示多长时间以后，用在将来时态中；B. Upon +doing sth 相当于As soon as+从句，表示一……就……；C. As soon as+从句, 一……就…… ；D. At+时间点，表示在几点钟。由题意可知选B正确。
考点：考查介词的用法。