1.speech(演讲)的复数是什么?
5个回答

1. speeches

2. didn't

3. fall over... 落在...之上

fall over 脸朝下跌倒

fall down... 从...摔下

fall down 摔倒

以上两个短语都可以既做不及物动词,单独使用或在后面再加介宾结构,如:

I suddenly fell over/down (from my bike).

也可以把over和down视为介词,如:

I fell over the ground. I fell down my bike.

4. haven't checked

5. was happening