Every one of us must know：________we live can we save the earth.
| A．by changing the way only |
| B．only by changing the way |
| C．by only changing the way |
| D．by changing only the way |
Some StraightA students in school ________ to be less successful in society than they ________ expected.
| A．turned out; are | B．have turned out; were |
| C．will turn out; were | D．had turned out; were |
—When did Bob leave?
—I have no idea. I ________ a shower upstairs.
| A．took | B．have taken |
| C．was taking | D．would take |
She is a hardworking student, and all her spare time she has ________ staying in the library.
| A．spent | B．is spent |
| C．to spend | D．to be spent |
—Do you know the Water Cube at all?
—No, this is the first time I ________ here.
| A．have been | B．came |
| C．was | D．am going |
A kind of newlymade shoes, if put into the market, ________ large orders because the heels can switch from 9 to 4 centimeters.
| A．meets | B．will meet |
| C．has met | D．met |