问题描述：
关于动名词,his parents insist on
his parents insist on _____ to college
a.he should go
b.he go
c.his going
d,him to go
我知道insist on doing 但不知道为什么加his
his parents insist on _____ to college
a.he should go
b.he go
c.his going
d,him to go
我知道insist on doing 但不知道为什么加his
问题解答：
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