单项选择题

A．Their surface features.B．Their chemical composition.C……

A．Their surface features.
B．Their chemical composition.
C．Their temperature.
D．Their age.

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单项选择题A．There is a car accident on the highway, but nobody gets hurt.B．The lady in the car should be sent to hospital immediately.C．An ambulance is sent because a person gets badly hurt.D．A car broke down and has to stay on the highway.

A．There is a car accident on the highway, but nobody gets hurt.
B．The lady in the car should be sent to hospital immediately.
C．An ambulance is sent because a person gets badly hurt.
D．A car broke down and has to stay on the highway.

单项选择题A．She’s not sure how she was able to finish so early.B．She wasn’t able to manage the project well.C．She’s not sure how to solve the mystery.D．She still hasn’t heard what was shocking.

A．She’s not sure how she was able to finish so early.
B．She wasn’t able to manage the project well.
C．She’s not sure how to solve the mystery.
D．She still hasn’t heard what was shocking.