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

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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.

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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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大学英语六级

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