2. 外语
  3. By the time she takes the entrance examination, Louis ______ Spanish for five years.

By the time she takes the entrance examination, Louis ______ Spanish for five years.

admin2010-01-15  12
问题 By the time she takes the entrance examination, Louis ______ Spanish for five years.
选项 A、had been studying
B、has studied
C、will have been studying
D、will study
答案C
解析 一般说来，如果以by the time引导的从句使用的是现在时，那么主句是用将来完成时。又因为主句出现了表示持续时间的短语for five years，因此，本题的主句应该用将来完成进行时。
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