问题

I don’t know ______ with this problem. It’s too hard. — You can ask Mr Wang for help.
A:which to deal
B:when to deal
C:what to deal
D:how to deal
B:when to deal
C:what to deal
D:how to deal
正确答案是:
同类题型
My parents will take me to Hong Kong ________ vacation.[ ]
There are 40 boys here. Some are from China, _______ are from Japan.
I don’t think Lily can sing _______ Lucy.—I disagree. I think Lily can sing ______ Lucy.
Johan didn’t review(复习)lesson, ________ he couldn’t answer the teacher’s question.[ ]