单项选择题

（）, electrons are still smaller.

A. As atoms small are
B. As atoms smaller as
C. Small as atoms are
D. Smaller atoms as are

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单项选择题
—You’re not a freshman, are you —（）, I am a second-year student.

A. Yes, I’m not
B. No, I am
C. No, I’m not
D. Yes, I am
单项选择题
Mary has just called and asked （）to have lunch with her tomorrow.

A. you and I
B. you and me
C. I and you
D. me and you
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