本帖最后由 Rachel0818 于 2013-5-10 10:22 编辑
如何选择?
1.It was yesterday evening ___ my father did the experiment in the lab.
A.that B.when
2.It was last night ___ I see the comet.
A.that B.when
3. It is huge sums of money that Western health-care system are spending on the surgical treatment of the disease. 是强调句还是定语从句?