单项选择题

A．Their tasty meat.
B．The principle of their defense system against disease.
C．Their solid skin.
D．The principle of their birth modes.
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You are allowed 35 minutes to write a composition on the topic: How to Deal with Personal Crisis. Your composition should contain the following points: (1) The causes for personal crisis. (2) Ways to cope with personal crisis. You should write 160--200 words on ANSWER SHEET 2.
填空题
Darwin filled his book with facts instead of just writing down
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