Question

这是高中英语强调句的，求帮忙

1.It was July 1st,1997 ___ saw the return of Hong Kong to the motherland.
A.that B.when C. which D. in which
这一题是强调句吗，为什么选that？ 为什么题目不在July前面加on?
2. It is two years __ I joined the army.
A.before B. since C.that D. after
3. It was two years ___ I joined the army.
A.before B. since C.that D. after

第二题选B，第三题选A，为什么啊？
第三题是before引起的时间状语从句，要怎样才可以选that？
如何将第二或第三题改成强调句？
求大神解救

Answer 1

1.It was July 1st,1997 that saw the return of Hong Kong to the motherland.

你会发现see这个动词没有主语，所以日期拟人化，不再是时间状语，也就没有on.
1997年7月1日见证了香港回归祖国怀抱。
2. It is two years since I joined the army.
我参军已经有两年了。
since意为：从...起
3. It was two years before I joined the army.
两年后我入了伍。（我入伍之前有两年时间）
2、3题区别就在主句的时态is和was，不能改强调句

Answer 2

强调句It is (was) + 被强调部分+ that (who) + 句子

判断的话就是It is (was)和that（who）可以删去，还可以是一个完整的句子

二三题根据句意还有时态判断是不能改为强调句的，并不是要强调两年这个时间所以是个时间状语从句哦！希望有帮助，不懂可以继续问