( )（3）________ the even of the festival, people have dumplings.
A. in B. on C. at
你想知道土豆多少钱一斤，应该说：
A.How much are those potatoes?
B.How are the potatos?
你想知道John星期四上什麽课，应该说：
A.What do you do on Thursday ,John?
B.What lessons do you have on Thursday ,John?
你想知道Tim 的妈妈在卫生间干什么，应该说：
A.Where’s your mother, Tim?
B.What’s your mother doing in the bathroom, Tim
你想知道对方上学的时间，应该说：
A.When do you go to school?
B.Where can you go?
你想知道Tim喜欢什麽科目，可以说：
A.What lessons do you have, Tim?
B.What subject do you like, Tim?