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  • 科目:英语
  • 题型:单选题
  • 难度:中等
  • 人气:1829

—Sorry, Mr. Smith. I left my homework at home this morning.
—Never mind. But be careful ______ that again.

A.not do B.not to do
C.don’t do D.not doing
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—Sorry,Mr.Smith.Ileftmyhomewor