单项选择题

Passage Two
Questions 29 to 31 are based on the passage you have just heard.

A．It is not convenient to walk outside.
B．They must take charge of the house.
C．The chances of being attacked have grown.
D．They will do the housework.
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单项选择题
According to the scientists, because of some damage, now Canada’s forests ______.
A．are greatly damaged by global warming
B．approach the threatening line
C．take in less carbon dioxide than they produce
D．become net carbon sources
单项选择题
A．He lost Sally’s new address.B．Sally will appear unexpectedly.C．He is no longer in contact with Sally.D．He will send the email by himself.
A．He lost Sally’s new address.
B．Sally will appear unexpectedly.
C．He is no longer in contact with Sally.
D．He will send the email by himself.
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