单项选择题

A．It was difficult to collect.
B．It was difficult to get rid of.
C．It came in a variety of forms.
D．It tended to be absorbed by physical objects.
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relaxation
单项选择题
A．He should base his paper on a lot of research.B．He should include less arguments in his paper.C．He should use his experiences and analogies to support his arguments.D．He should write a longer paper.
A．He should base his paper on a lot of research.
B．He should include less arguments in his paper.
C．He should use his experiences and analogies to support his arguments.
D．He should write a longer paper.
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