Scholars maintain that social development can easily _____ language changes.

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