The River Nile ___ flood large areas, but now the water of it ___ produce electricity.
| A．was used to ; is used to | B．used to; used to | C．used to; is used to | D．was used; is using |
—How long ____ in Guilin, Nancy ?
—About a week. I’ll give you a call when I arrive there.
| A．do you stay | B．did you stay |
| C．were you staying | D．are you staying |
______ of the students who took part in the military training is 450.
| A．A number | B．A great deal of |
| C．Lots of | D．The number |
At the end of last class, the English teacher requested that the homework _____ this morning.
| A．be handed in | B．handed in |
| C．would be handed in | D．had handed in |
Although they had been away for many years, they _____each other as soon as they met.
| A．understood | B．realized |
| C．recognized | D．found |
—What did he say?
—He asked _____ for the book.
| A．how much did I play | B．I paid how much |
| C．how much I paid | D．did I pay how much |