单项选择题

Hardly （） when a loud explosion was heard.

A．the train had started
B．the train had been started
C．had the train started
D．did the train start

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单项选择题
There are so many restaurants along the street that I'm not sure which one （）.

A．to be eating at
B．to eat at
C．eating at
D．for eating at
单项选择题
I walked too much yesterday and （） are still aching now.

A．my leg muscles
B．my leg's muscles
C．my muscles of leg
D．my muscles of the leg
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