Jack sent for a doctor after we met with the accident.________I stayed there with the injured old woman.

Our government________the measures put forward by some experts at the meeting and decided to carry them out at once to prevent further air pollution in this area.

Only when he put his foot into the river________that the water was too cold to swim in.

Hardly________of the room when it began to rain.

He may be________of playing his radio too loudly by law，especially when it is time for sleeping.

I have ever found such a case________the son refused to support his mother when she became too old to feed herself.

We didn’t feel surprised when we found he fixed his eyes on the food with a(n)________expression on his face，for we knew that he hadn’t eaten anything for 3 days.

With his attention________on the shops along the roadside，he knocked an old man down while riding to school.

A  concentrating     B．concentrated     C．to concentrate      D．concentrates

答案　B

解析　考查词组，故选B项。

It was raining heavily.Little Mary felt cold，so she stood________to her mother.

Last night I watched Milan A．C.________football on TV.

A．were playing  B．to play    C．played      D．play