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A. for B. in C. on D. at

【題目】—Are those your grandparents?
—Yes，________.
A.these are
B.they're
C.they are
D.those are

—________.

A. Yes，it isn't B. No，it is C. Yes，I am D. No，it isn't

A .learns B. learn C. to learn

— Yes. They are usually regarded ______ symbols of good luck.

A. for B. by C. with D. as

—Don’t worry. It ＿＿＿ be him. Mr. Smith is much taller.

A. mustn’t B. must C. can’t

A. must B. can C. would D. will

A. over B. against C. to D. For

A. put up B. think up

C. set up D. cheer up

--- It be a hotel. But I'm not sure.

A. must B. have to C. might D. can