For many overseas Chinese, China is their real （）, because they were born and grew up there.

单项选择题With all your brains you （） the math test, but you failed. You were too careless.

A. should pass
B. should have passed
C. must pass
D. must have passed

单项选择题Have you ever visited the Summer Palace, （） there are many beautiful halls, ridges and a huge lake.

A. which
B. that
C. where
D. when