I appreciated ____ the opportunity to study abroad two years ago.
| A．having been given | B．having given |
| C．to have been given | D．to be given |
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; /; / |
Some students interested in biology have _____________to the classroom with electric facilities.
| A．exit | B．access | C．right | D．enterance |