单项选择题

A．She doesn’’t expect to finish all her work in thirty minutes.
B．She has to do a lot of things within a short time.
C．She has been overworking for a long time.
D．She doesn’’t know why there are so many things to do.
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单项选择题
Evidence of past climatic changes indicates that __________.
A．human activities have accelerated changes of Earth’’s environment
B．Earth’’s environment will remain mild despite human interference
C．Earth’’s climate is bound to change significantly in the future
D．Earth’’s climate is unlikely to undergo substantial changes in the future
问答题
The danger of symmetry, and repetition especially, is that it can be used as________ for thought.
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