1.This kind of medicine【 works 】（起作用）well and I feel much better
2.Danny is 【 introducing 】（做介绍）to his classmates now
3.She will make her【 presence 】（present）to the class tomorrow
4.Tom didi a presentation about nature for his friends（改为同义句）
Tom 【 made 】a presentation about nature for his friends
5.What does your mother do?（改为同义句）
What【is 】【your 】【 mother 】?
6.他们上周玩的很开心
They 【 had 】【 fun 】/【 enjoyed 】【 themselves 】last Sunday.
祝你学习进步,更上一层楼!请记得采纳,谢谢!(*^__^*)