He had left his key at school, so he had no choice but ________.

1. A.
   wait for his mother to come back
2. B.
   to wait his mother to come back
3. C.
   wait for his mother come back
4. D.
   to wait for his mother to come back

He had left his key at school, so he had no choice but ________.

[　　]

A．wait for his mother to come back

B．to wait his mother to come back

C．wait for his mother come back

D．to wait for his mother to come back

A. wait for his mother to come back   B. to wait his mother to come back

C. wait for his mother come back    D. to wait for his mother to come back

He had left his key at school，so he had no choice but________ .

A. wait for his mother to come back   B. to wait his mother to come back

C. wait for his mother come back    D. to wait for his mother to come back