单项选择题

What should be blamed for the crash

A．Terrorist attacks.
B．U.S. sanctions.
C．Lack of spare parts.
D．Lack of regular maintenance.
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单项选择题
What does the woman suggest the man do
A．Stop moaning and get some crackers.
B．Go skiing.
C．Finish the paper this weekend.
D．Ask for a 2-day extension.
单项选择题
The passage tells us that cats___________.
A．sleep longer than humans
B．have similar sleeping habits as humans
C．have no regular sleep
D．take naps besides their regular sleep
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