The girl is often listened to_songs in the next room.
A.practise to sing B.practise singing C.to practise to sing Dto practise singing
选什么啊?为什么
是不是有listen to sb to do这个词组?
Soon they saw the two strangers _in the crowd.
A,disappear B.to disappear Cdisappearing Ddisappeared
这道呢?
see sb do sth指动作已结束
see sb doing sth 指动作正在进行
根据句意应该是A