The floor is dirty and it requires _________.
| A．being cleaned | B．clean | C．to clean | D．cleaning |
Could you tell us ______ happens when one student in class expresses a personal opinion _______ maybe upsets other students?
| A．that; that | B．what; where | C．that; where | D．what; that |
Let’s take _____ ten-minute break and have _______ drink of water.
| A．a; a | B．the; the | C．the; a | D．不填；the |
He _______ us that everything would go according to plan, but it turned out a failure.
| A．suggested | B．demanded | C．ordered | D．guaranteed |
His sister left home in 1998, and since.
| A．had not been heard of | B．had not heard of |
| C．has not been heard of | D．has not heard of |
The weather in Beijing in winter is colder than in Fuzhou.
| A．one | B．it | C．that | D．what |