根据答句写出问句。3X-p)E;U1N6]1Z7D*V
1、A:7A,b*]8B8s/t;a4O3X-p)E;U1N6]1Z7D*V
B: There are thirty desks in the classroom.3X-p)E;U1N6]1Z7D*V
2、A:7Y:v/i7r4H9i3C(R+E3X-p)E;U1N6]1Z7D*V
B: It's about three kilometres away.3X-p)E;U1N6]1Z7D*V
3、A:;}9t(g,B;t-g)E.S.p'b8c0L:u3e3X-p)E;U1N6]1Z7D*V
B: He is twenty years old.3X-p)E;U1N6]1Z7D*V
4、A:.n8v/k9W0X3X-p)E;U1N6]1Z7D*V
B: The pen is only ten yuan.3X-p)E;U1N6]1Z7D*V
5、A:/f5i5[5I-_4f4N8l3X-p)E;U1N6]1Z7D*V
B: It's half past ten.3X-p)E;U1N6]1Z7D*V
6、A:*n7t*Z;[)V3X-p)E;U1N6]1Z7D*V
B: Twenty plus one is twenty-one.3X-p)E;U1N6]1Z7D*V