一、单选题（共 20 道试题，共 100 分。）V
1. In today’s world, some people waste food ________ others haven’t enough.
A. though
B. as
C. when
D. while
满分：5 分
2. When we are going mountain-climbing, we should be careful and avoid ________.
A. taking place
B. taking effect
C. taking part
D. taking risks
满分：5 分
3. The young scientist ________ to have discovered a new planet.
A. suggests
B. claims
C. pursues
D. deals
满分：5 分
4. We ______________your terms carefully but______to say that we cannot accept them.
A. are studying/regret
B. have studied/are regretting
C. have studied/regret
D. have been studying/will regret
满分：5 分
5. If I had remembered _________ the door, the things would not have been stolen.
A. to lock
B. locking
C. to have locked
D. having locked
满分：5 分
6. We the last bus and didn’t have any money for taxi, so we had