—How long in America?
—Two years. I came back last month.
| A．have you studied | B．do you study |
| C．would you study | D．did you study |
Good shoes, clothes and a backpack are the basic______ you need for your hiking.
| A．equipment | B．instrument | C．tools | D．fixings |
If you _______ carry with you the belief that all you do is right, it’s none of my business.
| A．should | B．may | C．can | D．must |
More and more rich people have promised to _____ their wealth after death to help the poor and the disabled.
| A．give away | B．give up | C．give out | D．give in |
Previously ______ at a fast food restaurant, the Smiths were dissatisfied with the unhealthy meals they served there.
| A．volunteered | B．to volunteer | C．volunteering | D．having volunteering |
The story shows that _______ knowledge of _______ first aid can make ______ real difference.
| A．the; the; / | B．a; /; a | C．/; the; a | D．a; /; / |