The River Nile _______ flood large areas, but now the water of it _______ produce electricity.
| A．used to, is used to | B．used to, used to | C．is used to, is used to | D．is used, to used to |
We consider ____ absolutely necessary that we should open our door to the outside world.
| A．it | B．what | C．that | D．which |
She asked me __________I __________him the night before.
| A．why ; saw | B．what ; had seen |
| C．whether; saw | D．whether; had seen |
-- Miss Wang ,I hear that you ___________along the Mekong River. Have you got everything ready?
--Almost.
| A．is travelling | B．are travelling | C．travelled | D．would travel |
Here are my neighbours ________home was destroyed by the earthquake.
| A．whose | B．who | C．whom | D．that |
In fifteen terrible seconds a large city lay _____________.
| A．right away | B． in ruins | C． as if | D．at an end |