问题
Mary loves singing so much. She ________ after school very often.
A:is heard sing
B:is heard to sing
C:hears sing
D:hears sing;
B:is heard to sing
C:hears sing
D:hears sing;
正确答案是：
同类题型
She is a woman of great knowledge, _______ much can be learned.
Your story is perfect; I’ve never heard_____ before．
I have no _______ to the plan, so long as it would notcost too much.
We’ll ___ for you outside the school gate.
Sorry, I can’t workout this problem. —Try again,please. It’s only ______ difficult.