单项选择题

A．It affects the growth of trees.
B．It has been increasing since the Ice Age.
C．It is determined by the chemicals in the air.
D．It follows a certain cycle.
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单项选择题
According to the text, interest in robots has increased in recent years because of ______.
A．RoboCup
B．Sony’’s Aibo dog
C．a rise in public awareness
D．technological advances
单项选择题
A．Two weeks after you opened the account.B．At least one week after you opened the account.C．Less than a week after you opened the account.D．Immediately after you opened the account.
A．Two weeks after you opened the account.
B．At least one week after you opened the account.
C．Less than a week after you opened the account.
D．Immediately after you opened the account.
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