问题
选择题
When you’re learning to drive，_____ a good teacher makes a big difference.
A．have
B．having
C．and have
D．and having
答案
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。
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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
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。