2. 外语
  3. A new high-performance contact lens under development will not only correct ordinary vision defects ______(而且还可以提高正常的夜间视力) as mu

A new high-performance contact lens under development will not only correct ordinary vision defects ______(而且还可以提高正常的夜间视力) as mu

admin2013-06-02  38
问题 A new high-performance contact lens under development will not only correct ordinary vision defects ______(而且还可以提高正常的夜间视力) as much as five times.
选项
答案but(also)will enhance normal night vision
解析 本题考查对not only…but(also)…有关用法的掌握。not only…but(also)…通常用来连接两个并列结构，本句中是用来连接两个并列的谓语。两部分谓语必须时态一致，所以空格处也应用一般将来时。but also中的also可以省略。
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