问题
_______ is necessary for you to lock the car when you don’t use it.
A:What
B:This
C:It
D:That
B:This
C:It
D:That
正确答案是：
同类题型
There are some birds singing ___ the trees.[ ]
Your cat looks lovely. I also want to keep ___________.
What do you think of their marriage? —______, if I were Kate, I would not marry him.
I can’t agree more. _______. There is no short cut.
How do you usually come to school, by bus or by bike? –. I walk.