Some physics problems in this book are _________difficult for the students _________work out.
| A．so; that | B．not; but |
| C．such; that | D．too; to |
Yoube hungry after the long walk．Help yourself to some cakes．
| A．can’t | B．shouldn’t | C．need | D．must |
Although you may meet some difficuIties,you should never．
| A．turn up | B．get up | C．give up | D．grow up |
…It’s surprising that he got such a high mark!
…Yes.I wonderit．
| A．how did he do | B．how he did | C．why did he do | D．that he did |
—He asked her_________the bag because it was too expensive．
| A．not to buy | B．to buy not | C．not buying | D．not buy |
…Is thisbook you were talking about yesterday?
…Yes，thank you very much.
| A．a | B．all | C．the | D．不填 |