The boy didn't know___.A:what to do it B:what to do C:when to do D:how to do
问题描述:
The boy didn't know___.A:what to do it B:what to do C:when to do D:how to do
答
B
答
这个男孩不know___。A:什么吗B:怎么做:当做D:如何做
A
答
选B.
A选项 去掉it;C选项和D选项 要在最后加it