单项选择题

A．The trouble of melting coniine oxide.
B．The high price of it.
C．The difficulty of spraying it on the engine parts.
D．It being not environment-friendly.
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单项选择题
A．She didn’t buy the coat.B．She thought the coat was too expensive.C．She bought the coat with satisfaction.D．The coat fit her quite well.
A．She didn’t buy the coat.
B．She thought the coat was too expensive.
C．She bought the coat with satisfaction.
D．The coat fit her quite well.
单项选择题
A．Go through a health check.B．Take little luggage with them.C．Arrive early for boarding.D．Undergo security checks.
A．Go through a health check.
B．Take little luggage with them.
C．Arrive early for boarding.
D．Undergo security checks.
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