1 . He is examining the composition he has just finished___________ the possible grammatical and spelling mistakes in it.

A．correcting

B．to correct

C．having corrected

D．being corrected

2 . At last she left her house and got to the airport, only ___________the plane taking off.

A．having seen

B．to see

C．to have seen

D．saw

3 . A shopper rarely speaks to a shop assistant except ___________for help or information, but this is not the case in some countries.

A．to ask

B．asking

C．asked

D．to be asked:

4 . There's a man at the reception desk who seems very angry and I think he means__ trouble.

A．making

B．to make

C．to have made

D．having made