1. He was proud of being chosen to participate in the game and he us that he would try as hard as possible. (2003.06)
A) insured B) guaranteed C) assumed D) assured
2. Some well-known scientists believe that there is not enough oxygen on Mars to
human life.
A) remain B) retain C) sustain D) last
3. He is easily so I do not like to talk with him.
A) defended B) afforded C) created D) offended
