一、单选题（共 30 道试题，共 100 分。）V
1. Scholars maintain that social development can easily _____ language changes.
A. bring forward
B. bring about
C. bring out
D. bring up
满分：3 分
2. Mary settled in Seattle, _____ she had obtained a master's degree in economics.
A. since when
B. by when
C. since which
D. by then
满分：3 分
3. The dollar has gone down against yen; _______Japanese goods are more expensive for Americans.
A. therefore
B. however
C. and still
D. and yet
满分：3 分
4. If you pour oil on water, it_________float.
A. shall
B. will
C. can
D. may
满分：3 分
5. We need more food to protect us ________ the famine.
A. out
B. off
C. to
D. against
满分：3 分
6. _____ is generally accepted, economic growth is determined by the smooth development of production.
A. Which
B. As
C. Since
D. What
满分：3 分
7. I've _____ these lines again and again but I still keep forgetting them.