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After a knock at the door, the child heard his mother’s voice ______ him.

   A. calling  B. called  C. being called       D. to call

After a knock at the door, the child heard his mother’s voice           him.

A．calling

B．called

C．being called

D．to call

After a knock at the door, the child heard his mother’s voice ______ him.

 After a knock at the door, the child heard his mother’s voice ______ him.

   A. calling    B. called        C. being called  D. to call

After a knock at the door, the child heard his mother’s voice ______ him.

A. calling 　　　　　 B. called 　　　　　 C. being called　 　 D. to call