单项选择题

A．When and how umbrella was invented.
B．Why the umbrella was so popular in Europe.
C．The development of the umbrella.
D．The history and use of the umbrella.
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单项选择题
A．Go to her place as it is quieter.B．Relax for a while from his studies.C．Try to be more attentive when he studies.D．Go to the study lounge to continue his study.
A．Go to her place as it is quieter.
B．Relax for a while from his studies.
C．Try to be more attentive when he studies.
D．Go to the study lounge to continue his study.
单项选择题
A．They came from the original wing.B．They’re made of the same material.C．They’re similar in shape.D．They were designed by the same person.
A．They came from the original wing.
B．They’re made of the same material.
C．They’re similar in shape.
D．They were designed by the same person.
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