问题
选择题
It worried Mary a lot__________she would pass the college entrance examinations.
A．whether
B．if
C．that
D．how
答案
A
此题考查whether引导主语从句，it在句子中作形式主语。
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It worried Mary a lot__________she would pass the college entrance examinations.
A．whether
B．if
C．that
D．how
A
此题考查whether引导主语从句，it在句子中作形式主语。