Dinner usually________ at six o'clock.
A. start B. starts C. to start
—Could you please tell me________？
—Yes．There is one on Center Street．
| A．where can I buy some stamps |
| B．when you will take your vacation |
| C．when was the telephone invented |
| D．if there are any good restaurants around here |
—Is Kate serious？
—I________．She never mentions it．
| A．suppose |
| B．agree |
| C．believe |
| D．wonder |
It’s cold outside．________your sweater before you go out．
| A．Put on |
| B．Turn on |
| C．Put up |
| D．Give up |
—How long does it take to get to the airport？
—Forty minutes．But it’s foggy today．I’m not sure________the highway will be closed soon．Let’s set off earlier．
| A．whether |
| B．when |
| C．how |
| D．why |
—You study________hard________you’re sure to pass the exam．
—Thank you for saying so．
| A．enough；to |
| B．as；as |
| C．so；that |
| D．such；that |