问题

The boy is often heard in the music room. He sings very well.

A:practice singing
B:to practice singing
C:practiced singing
D:to practice sing;

正确答案是：

同类题型

If you_____this experiment you willunderstand the theory better

The old man said the accident ________ careless driving，so the driver ________ the money for the repairs.[ ]

一 Whatwould you do if it ______ tomorrow一 Wehave to carry it on, since we’ve got everything ready.

’t you believe me” “______, I’ll believe _______you say.”

She is being pleased about it; she is very angry．