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 |
----Any news about Bill Clinton?
----He left power three years ago and has a little now and a little then been ______.
| A．heard of since | B．heard since |
| C．heard before | D．heard of before |
If you want to sell your product you must _____ it.
| A．advertise | B．advertise for | C．advertise on | D．advertise to |
—Shall I open the window to let some fresh air in?.
—No, ______.
| A．I'd rather not | B．I'd rather you not |
| C．I'd rather you didn't | D．I'd like not to |
Someone called me up in the middle of the night, but they hung up ______ I could answer the phone.
| A．as | B．since | C．until | D．before |
Please tell me the way you thought of ______ the garden.
| A．take care of | B．to take care of |
| C．taking care of | D．how to take care of |