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--- Three dollars.

A. is B. are C. do D. does

一Yes. I am afraid I can't swim it.

A. across B. past C. through D. over

A. full B. famous C. rich

A. program B. resolution C. prediction D. preparation

【題目】In order to keep healthy, I have a medical examination every year.
A.narrow
B.regular
C.same

A. the; the B. an; the C. an; a D. a; a

--- Yes, please. I want socks.

A. a pair B. two pairs C. two pair of D. two pairs of

A. That's because B. That's why C. That's when D. That's what

一I'm not sure. I take a trip to the USA.

A. should B. need C. must D. may

--- .

A. Thank you B. Yes, please

C. You're welcome D. I don't want your help