翻译句子;1.如果你想节省时间，去买东西之前，先列一张购物单。

If you want to save time ,you can make a shopping list before you go to the shop

When I mention the matter she always frowned

When hearing the matter I can't help but laugh

I have been greatly improved in mathematics this term

jointed或者take part in

最后一个没明白 打错了吧

如果你想节省时间，去买东西之前，先列一张购物单。
If you want to save time, buy something before you set out a shopping list.
当我提起那件事时她就皱起眉头。
When I mention the matter when she frowned.
听到那件事，我忍不住大笑。
To hear the matter, I could not help laughing
这学期我的数学成绩有了很大提高。
This semester I have greatly improved in mathematics achievement.
Li lei is a member of our school football team.（改为同义句）
This is our school's football players Li Lei

如果你想节省时间，去买东西之前，先列一张购物单。
If you want to save time, buy something before you set out a shopping list.
当我提起那件事时她就皱起眉头。
When I mention the matter when she frowned.
听到那件事，我忍不住大笑。
To hear th