1 . ______ us prepare for the exam, the teacher suggested reading through our notes.

A．To help

B．Helped

C．Helping

D．Being helped

2 . The time he has devoted in the past years _________ the disabled is now considered _________ of great value.

A．to help; being

B．to helping; to be

C．to help; to be

D．helping; being

3 . With a lot of difficult problems_____, the newly-elected Prime Minister will have a hard time.

A．settled

B．settling

C．to settle

D．being settled

4 . He hurried to the airport with his friends only ______ that all the film stars they liked best had been picked up by their company.

A．to tell

B．to be told

C．telling

D．told

5 . I missed the last bus and had no money for a taxi，so I could do nothing but ____ home last night.

A．to walking	B．walk
C．walking	D．walked

6 . She said she was sorry ________ the train, so she had to stay for another day.

A．missing

B．having missed

C．to miss

D．to have missed

7 . Chinese President Hu Jintao called for an immediate cease-fire in Libya _____ an even worse humanitarian crisis in the country at the BRICS Summit in Hainan Province.

A．to prevent

B．to have prevented

C．preventing

D．having prevented