What is the best way you can imagine the overuse of water in our school?
| A．reducing | B．to reduce | C．reduced | D．reduce |
I wonder how it ____ that Chinese climbers successfully finished the torch relay on the Mount Qomolangma, where the air is so thin.
| A．came out | B．came across | C．came over | D．came about |
—You look unhappy， my son?
—I’m wondering how long it’ll be we come to China again.
| A．since | B．when | C．before | D．after |
—Isn’t it time you _______ down to _______ your own things?
—I’m sorry for the delay, Dad.
| A．get, pack | B．got, packing | C．got, pack | D．get, packing |
— How about camping this weekend , just for a change?
— OK, __________ you want.
| A．whichever | B．whatever. | C．whoever | D．however |
When he came back three hours later, they were still ____on the sofa, _____ in conversation.
| A．sitting ; absorbing | B．sitting ; to absorb |
| C．seated ; absorbed | D．seated ; to be absorbed |