单项选择题
I knew I could not finish my homework()
A. by he had come B. until he came C. when he comes D. before he comes
单项选择题 It is essential that people () enough vitamins every day.
单项选择题 Not only Tom but also his wife () fond of watching television.
单项选择题 Not only the students but also the teacher()going to see the film.
