问题
选择题
Mark drives his car too fast and, what's more, very carelessly, ________ worries his mother.
A．a
B．what
C．it
D．which
答案
答案：D
答案：D。考查定语从句。此处which引导非限制性定语从句，同时在从句中作主语。
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Mark drives his car too fast and, what's more, very carelessly, ________ worries his mother.
A．a
B．what
C．it
D．which
答案：D
答案：D。考查定语从句。此处which引导非限制性定语从句，同时在从句中作主语。
