____ that caused him to serve dinner an hour later than usual.
| A．It was we being late | B．It was our being late |
| C．It was we were too late | D．It was because we were late |
Another primary school is reported _______ for children in Wen Chuan now.
| A．to have been built | B．to have built |
| C．being built | D．to be building |
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 |