北师大2014春网络教育《专科英语一》作业3部分答案
1、
Seldom ______ to the library during his college days. he went did he go does he go he goes
2、
Many students were seen ______ in the last exam. being cheating to cheat cheat cheated
3、
The house ______ roof is blue has just been finished. whose which that whom
4、
Who will know how to ________ the system? permit found employ operate
5、
I have a _____ idea of what I want to express. generous general regular widespread