问题

It was during the Ming Dynasty________the Great Wall was repaired and extended to take on the appearance it has today.

A:when
B:which
C:what
D:that

正确答案是：

同类题型

There are students on the playground.

I ran 10 miles last weekend. Can you believe that? – Wow, that ______ easy!

It is believed ______ children should learn to be responsible from the very beginning．

Will you waste your time and money on that? — Certainly ________.

He _____ the bag, but saw nothing in it. [ ]