6．Mr Zhang teaches at Middle School.A.a No.5 B.No.5 C.the No

6．Mr Zhang teaches at Middle School.A.a No.5 B.No.5 C.the No.5th D.5th No
9．Xiao Mao and Da Mao are in .
A.team Fourth B.the team Four C.Team Four D.Four team
10．Sorry,had been sold out.
A.42 size B.Size 42 C.the 42 size D.the size 42
这三道题的答案分别是什么?请解释具体原因