Question

1 While we were riding along the river,we found that a lot o

Answer 1

1.C.that后为宾语从句,用被动语态的进行时.

2.A.result in 导致,不用被动语态.

3.C.be described as ：被描述为.

4.D.be hidden by：被...掩埋

5.B.sound 听起来,是系动词,不用被动语态.

6.C.though she'd been asked several times.尽管她被问了好几次.表示被动.

7.B.are required to do sth：被要求做某事.

8.A.turn out ：证明是,是半系动词,后接表语或that从句.不能被动.