题目内容：

把下列句子改成同义句
31 I became a teacher in 2000.
32 The river became dirty last year.
33 The shop closed two hours ago.
34 The door opened at six in the morning.
35 I got up two hours ago.

优质解答

更正楼上答案：I后面用has?且时间状语改成since/for...之后,句子的谓语动词必须变成延续性动词.31.I have been a teacher since 2000.since引导时间状语,句子必须用延续性动词,而become是瞬间性动词.32.The river ha...