单项选择题

A．Crowded air traffic.
B．The large size of airplanes.
C．Mistakes by air traffic controllers.
D．Bad weather.
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单项选择题
A．She couldn’t go to Spain for holiday this summer.B．She couldn’t communicate with Spanish people very well.C．She didn’t learn enough Spanish vocabulary.D．She had few chances to speak Spanish in Spain.
A．She couldn’t go to Spain for holiday this summer.
B．She couldn’t communicate with Spanish people very well.
C．She didn’t learn enough Spanish vocabulary.
D．She had few chances to speak Spanish in Spain.
单项选择题
A．She plans to apply for a part-time job.B．She’s too busy to run for class president.C．She wants the man to help her with her studies.D．She hasn’t considered running for class president.
A．She plans to apply for a part-time job.
B．She’s too busy to run for class president.
C．She wants the man to help her with her studies.
D．She hasn’t considered running for class president.
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