题目内容：

请根据要求改写下列句子,每空一词。

1.Suzy will fall behind if she doesn’t' t try her best.(保持句意基本不变)

Suzy will fall behind ____________she____________her best

2.The boy doesn’t' t know who he should go to for advice(保持句意基本不变)

The boy doesn't know____________ ____________go to for advice.

3.My uncle has been in the navy since he graduated from college. (划线部分提问)

____________ ____________has your uncle been in the navy?

4.Amy is very tired. She can't keep awake in the afternoon.(合并为一句)

Amy is ____________ tired ____________keep awake in the afternoon

5.Someone saw him enter the teachers' office this morning.（改为被动语态)

He ____________ ____________to enter the teachers'office this morning