单项选择题

The heart is an important organ of circulation（）function is to pump blood to all parts of the body.

A. which
B. whose
C. of it
D. its

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单项选择题

（）with the size of the whole earth, the highest mountain does not seem high at all.

A. When compared
B. Compare
C. While comparing
D. Comparing

单项选择题

What does the man tell the woman（）

A. The exam is very easy.
B. Be relaxed and calm and she will make it.
C. It is necessary to bring a dictionary with her.
D. It is possible to discuss questions with others during the exam.