If water becomes increasingly scarce in decades ______, water shortage will become a hot issue all over the world.
| A．coming | B．having come | C．to come | D．to be coming |
Children in the countryside can receive education ________ free since last year.
| A．for | B．in | C．of | D．on |
--- I can’t find Xiao Ping. Where did you see him this morning?
--- In the reading room _________ he often studies in.
| A．that | B．where | C．in which | D．the one |
I regret _________ going on a holiday to France because of the bad weather last week.
| A．having given up | B．to give up |
| C．having given back | D．to give back |
All __________ can be done has been done.
| A．which | B．that | C．/ | D．what |
--- What do you think of the film Schindler’s List?
--- This is the best film _______ I have ever seen.
| A．that | B．what | C．who | D．whom |