几道英语题谢谢解答---the time the bell rang every student of the clas

几道英语题谢谢解答
---the time the bell rang every student of the class was busy A at teading BBy reading C To to reading D for to read 用at不可以吗
Mike where are you giong to work ?
I'm going to work for a store--- sells teaA which B where C what D who
怎么会which 也不是定语从句啊
My brother --- TV in the living room when I --- home last night
A watched got B was watching got 答案是B不可以反下吗
Great changes un china in the past ten years A have happened B have taken place 答案B 但是A也是发生啊
Tom often makes his brother--- but yesterday he was made --- by his brother A cry to cry B cry cry 答案A但是两个make sd do sth 为什么第二要加to
Nancy,I bought you an iphone. Thank you ,Mum. it's --- what I want.
A just B still C only almost