问题
Mary liked to look back on her high—school days，she thought were the happiest in her life．
A:that
B:what
C:which
D:when
B:what
C:which
D:when
正确答案是：
同类题型
1一Is this man yourfriend一Yes， ．
（题文）The tiger, once a ____ animal to humans, is now ____ of disappearing on the earth.
She gave him the suggestion_____ he _____ Englishjn a better way.[ ]
The flower is beautiful.—____________
She told us what she bought yesterday ________ afew apples and some clothing.