看图写话根据所给的图和提示词，按要求各写一句意思完整，语法正确的句子(必须用上全部提示词)。(10分)

小题1: the gas, terrible

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小题2:the number, pandas ,smaller and smaller

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小题3: be a teacher, for three years

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小题4: in th past , keep in touch with, by letter

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小题5:Look, skate

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乙类项目管理单位必须具备以下基本条件：净资产（）万元人民币以上；

A.500

B.600

C.700

D.800