Less than 30 minutes．,From 30 to 45 minutes．,At least 4-找考题网

单项选择题

A．Less than 30 minutes.
B．From 30 to 45 minutes.
C．At least 45 minutes.
D．More than 45 minutes.

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问答题

S2. Michael Patterson wants us to come up with How and What instead of Why questions because he considers they are more practical than ________.

单项选择题

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