Since no one really knows what effects the GM food might have _____ us humans, many countries think that they should be cautious _____ this new technology.
| A．about; with | B．on; to | C．in; to | D．on; with |
______ does it take to win the hearts and minds of Grade 10 students ?
| A．How | B．When | C．Why | D．What |
. It’s q
uite an informal gathering; you needn’t _____ for it.
| A．dress down | B．dress up | C．dress | D．dress on |
You should not mention it in the beginning, or it will ________ the surprising ending.
| A．give off | B．give out | C．give up | D．give away |
He went to New York in the hope of getting a job there, but ______________ .
| A．without result | B．without chance | C．without luck |
D．without effect |
______ is known to all is that good friends ______ happiness and value to life．
| A．What；add to | B．It；add | C．What；add | D．It；add to |