17._____ at the gate of the theatre, he found the ticket for the play was left at home.
| A．To arrive | B．On arriving | C．As arriving | D．While arriving |
Tony was very unhappy for _______ to the party.
| A．having not been invited | B．not having invited |
| C．having not invited | D．not having been invited |
Having a trip abroad is certainly good for the old couple, but it remains _______ whether they will enjoy it.
| A．to see | B．to be seen |
| C．seeing | D．seen |
With a lot of difficult problems ________, the newly-elected president is having a hard time.
| A．settled | B．setting |
| C．to settle | D．being settled |
The picture _______ on the wall is painted by my nephew.
| A．having hung | B．hanging |
| C．hangs | D．being hung |
The lady said she would buy a gift for her daughter with the ________.
| A．20 dollars remained | B．20 dollars to remain |
| C．remained 20 dollars | D．remaining 20 dollars |