Don’t open the door to strangers；it’s not________．
| A．safe |
| B．polite |
| C．convincing |
| D．embarrassing |
Her mother goes to work________bus every morning．
| A．by |
| B．at |
| C．on |
| D．in |
It took Janet three hours________reading this interesting story．
A．to finish
B．finished
C．finishing
—________delicious the ice-cream is！Could you give me one more？
—Sure．
A．What
B．How
C．What a
We went to the beach on May Day and had a great fun________．
| A．swim |
| B．swims |
| C．swimming |
| D．to swim |
Which is a traffic sign？
| A．KEEP QUIET |
| B．DO NOT DISTURB |
| C．TURN LEFT |
| D．SOLD OUT |