We can never be too_______when making friends with strangers online, or you will be cheated
| A．confident | B．energetic |
| C．enthusiastic | D．cautious |
A study shows that students living in non-smoking dormitories are less likely to ________ the habit of smoking.
| A．pick up | B．turn up | C．draw up |
D．make up |
As we all know, ______ medical examination will help us find out health problems as early as possible.
| A．common | B．general | C．regular | D．normal |
Ann ______ here any more．She left last month.
| A．won’t work | B．doesn’t work | C．hasn’t worked | D．isn’t working |
The conference aims to develop business and let people think about ______ they can have a positive influence on the planet.
| A．why | B．that | C．what | D．how |
The traffic rule says young children under the age of four and less than 40 pounds must be in a child safety seat.
| A．being weighed | B．to weigh | C．weighed | D．weighing |