When you’re learning to drive, a good teacher makes a big difference. A. have B.
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When you’re learning to drive, _______ a good teacher makes a big difference.
A. have B. having
C. and have D. and having
试题答案
B
解析:
B。这是一个含when 引导时间状语从句的主从复合句，having a good teacher 在主句中用作主语。