I’m sorry for all your books the floor.
| A．knock, over | B．knock, onto |
| C．knocking, over | D．knocking, onto |
—I wonder_______ you’ll water this kind of tree．
—Once a week．
| A．how often | B．how long | C．how soon | D．how much |
We can have_______ bluer sky if we create________ less polluted world．
| A．a；a | B．a；the | C．the；a | D．the；the |
—Do you know if Cindy wilt drive to Italy this weekend?
—Cindy? Never! She___ driving．
| A．has hated | B．hated | C．will hate | D．hates |
I can________ be a nurse．I’m not a very patient person．
| A．seldom | B．ever | C．never | D．always |
The earthquake which happened in Yushu________ 14th April 2010 was a big disaster．
| A．at | B．on | C．in | D．to |