Question

1.在秋天是in fall还是in the fall

Answer 1

1`in fall 和in the fall 都可以

要看你在什么情况下用

如果特指某一个秋天,就用in the fall,

一般就用in fall.

2`acrobatics actsand movements 杂技

表演一般用perform (v.)

acrobatics performence 杂技表演

3`swimming glasses

或the glasses for swimming

4`不可数