13. He was walking ______ in front of the operating room while his wife was having surgery inside.
(A) on and off
(B) back and forth
(C) here and there
(D) now and then

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統計： A(13), B(233), C(54), D(11), E(0) #341652

詳解 (共 2 筆)

#3701252
(A)斷斷續續地(B)來來回回(C)到處...
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#328017
他在手術室門前來回走，而他的妻子接受手術內。
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