( ) -Who is singing in the next room? - must be Mary. A. She B. This C. It D. He——青夏教育精英家教网——

摘要：( ) -Who is singing in the next room? - must be Mary. A. She B. This C. It D. He

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—Who is singing in the next room?
—______ must be Mary.

A. She
B. This
C. It
D. He

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－Who is singing in the next room?

－________ must be Mary．

A．She

B．This

C．It

D．He

查看习题详情和答案>>

－Who is singing in the next room?

－________ must be Mary．

A．She

B．This

C．It

D．He

查看习题详情和答案>>