单项选择题
It is in this factory () I worked for ten years.
A. where B. what C. do D. that
单项选择题 --Which one can I take--You can take () of them. I'll keep none.
单项选择题 Tom is the man who always does () best even in the most difficult situation.
单项选择题 The question came up at the meeting () we had enough money for our re- search.