---What caused the party to be put off?
---_____________ the invitations.
| A．Tom delayed sending | B．Tom’s delaying sending |
| C．Tom delaying to send | D．Tom delayed to send |
The citizens of Beijing are proud of _______ they have done to make Beijing a beautiful city.
| A．that | B．which | C．what | D．how |
I am very grateful to my high school teachers, without ______ help I wouldn’t be so excellent.
| A．whom | B．them | C．which | D．whose |
The pop star walked out of the stage, ______ her hands elegantly to her crazy fans.
| A．waving | B．was waving | C．waved | D．to wave |
The group of the aged are close companions, and many of ______ have known each other for decades.
| A．them | B．that | C．whom | D．what |
We are so happy to see that some of the students have already learned enough English to ______ a conversation.
| A．hold on | B．keep on | C．go on | D．carry on |