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A. while B. when C. after D. because

【題目】— I'd like a pet, but I am busy all day.
— Goldfish are a good choice. You ________ feed them every day
A.needn't
B.can't
C.shouldn't
D.mustn't

A.on front of B. in front of C. in the front of

A. cry B. crying C. cried D. to cry

A.borrow B. keep C. return

—That’s true.I never go travelling a book.

A. without B. from C. on D. about

—Sometimes.

A.How long B. How many C. How often

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

—He lives __________ the second floor.

A.does, on B. do, on C. do, in

A. it B. this C. that D. these