(　　)13. Mr. Brown had a big problem. He walked ________ in front of his house.
(A) from door to door　
(B) more and more　
(C) sooner or later　
(D) back and forth

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統計： A(21), B(5), C(7), D(82), E(0) #359800

詳解 (共 1 筆)

#966396
back and forth 來回、往返
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