单项选择题

I know Mr. Brown, we（） to each other at an international conference.

A. are introduced
B. have been introduced
C. were introduced
D. had been introduced

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单项选择题
I’ve won a holiday for two to Florida. I （） my mum.

A. take
B. am taking
C. have taken
D. will have taken
单项选择题
The lady said she would buy a gift for her daughter with the（）

A. 20 dollars remained
B. 20 dollars to remain
C. remained 20 dollars
D. remaining 20 dollars
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