根据答句写出问句。 1、A: B: There are thirty desk
题型：猜谜题，问答题
问题：
根据答句写出问句。
1、A:
B: There are thirty desks in the classroom.
2、A:
B: It's about three kilometres away.
3、A:
B: He is twenty years old.
4、A:
B: The pen is only ten yuan.
5、A:
B: It's half past ten.
6、A:
B: Twenty plus one is twenty-one.
