—Nothing wrong with it , ?
—No .Yours is a specially-built model. Drive carefully , though .It takes time to run in a new car.
| A．is it | B．has it | C．are they | D．is there |
Teaching is a difficult job ______ requires great skill and patience．
| A．which | B．where |
| C．who | D．why |
Drivers must stop when the traffic lights _____ red．
| A．turn | B．will turn |
| C．turned | D．were turning |
There was an excited expression ______ his face when he heard the good news．
| A．of | B．on |
| C．at | D．over |
Milk will turn sour soon on hot days ______ it is stored in the refrigerator．
| A．since | B．until |
| C．because | D．unless |
You'd better not ride the bicycle on snowy days; you ______ fall．
| A．must | B．might |
| C．have to | D．ought to |