问题

Loulan is believed __________ over by sandstorms gradually from AD200 to AD400

A:to cover
B:to be covered
C:to have covered
D:to have been covered

正确答案是：

同类题型

Lu Xun is known __________us ___________ a great writer[ ]

_______, Jack couldn’t get the door open. He had to dial 119.

I can play ____soccer ,and I can play ___guitar too .

The meeting room isn’t _______ for all the students to sit _______.

Carmen prefers the music that _______ great lyrics.