No sooner______ a paper on his latest research than he was asked to write another for a conference.

admin2013-06-03  40

问题 No sooner______ a paper on his latest research than he was asked to write another for a conference.

选项 A、he had finished
B、he finished
C、did he finish
D、had he finished

答案D

解析
转载请注明原文地址:https://jikaoti.com/ti/9t6MFFFM
0

随机试题
最新回复(0)