18．---Who is singing in the room? --- must be Mary． A．This B．She C．He D．It 【查看更多】

 

題目列表(包括答案和解析)

－Who is singing in the next room?

－________ must be Mary．

[　　]

A．She

B．This

C．It

D．He

查看答案和解析>>

－Who is singing in the next room?

－________ must be Mary．

[　　]

A．She

B．This

C．It

D．He

查看答案和解析>>


同步練習冊答案