用所给词的适当形式填空。

1. Would you like some fish _______(eat).

2. The box is too heavy for Ann_______ (take)

3. The teacher made him _______ (clean)  the window

4. My father often teaches me _______ (make) toys.

5. The little boy often _______ (walk) home after school.

--- Sorry, Daddy. I am not getting on well with my studies.

--- Well._________You hadn’t wasted so much time playing online games.

A．As if

B．Even if

C．If only

D．Only if