问题
选择题
He is one of the students, who, I’m sure, always do _____best.
A．his
B．my
C．one’s
D．their
答案
答案：D
who always do their best是一个非限定性定语从句，修饰students，I’m sure是插入语。
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He is one of the students, who, I’m sure, always do _____best.
A．his
B．my
C．one’s
D．their
答案：D
who always do their best是一个非限定性定语从句，修饰students，I’m sure是插入语。