嗨,同学,
1、aren't (因为是复数,用are)
2、Thanks(和thanks一样,只是加强了感谢的程度)
3、don't(助动词否定know)
4、Their(他们的回答,应该用their,这是形容词性物主代词)
5、They are red hats.(注意用复数)
6、I don't konw his telephone number.(和第三个一样,助动词否定)
7、What color are their schoolbags?(这是问颜色的提问,你记住就好了)
8、He doesn't want to go to the movies.(这也是助动词否定,不过要注意want不再加s了)
还有问题么,