题目内容

--You look so pale.What trouble you? ----I ___ my dead mother.
A．though aboutB．was thinking aboutC．have thought aboutD．am thinking about
B
对过去的情况进行描述性的解释，这种解释答了问题的原因，A项答What did you do 的问题。C项没有直接答问题，D项时态表达错误。
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