题目内容

There is ___ “s” and ___ “u” in the word “use”.

A. a/a
B. a/an
C. an/an

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___ Earth runs around ___ Sun.

A/the
B. An/the
C. The/the

— What is your mother doing?— She is ___ for the bus.

A. waiting
B. waits
C. wait

___ my parents’ help, I begin to catch up ___ my classmates.

A. With/to
B. Under/with
C With/with

— Do you know the differences ___ the three words?— Sorry, I don’t know.

A. among
B. between
C. with

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