Every parent is aware of their infant’s tendencies to rapidly go _____ between sleep and wakefulness.
(A) in and out 
(B) up and down 
(C) back and forth  
(D) inside and outside

答案：登入後查看
統計： A(73), B(144), C(358), D(39), E(1) #150643

詳解 (共 5 筆)

#240763
back and forth 來回地   
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#757309
所有的父母親都意識到他們的嬰兒在睡眠和睡醒之間快速來回的傾向。 
A.進進出出 B.到處 C.來回 D.裡裡外外
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#619783
為什麼 (B) up and down不行啊?
0
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#571825
(C) back and forth
0
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#571827
Every parent is aware of their infant’s tendencies to rapidly go back and forth between sleep and wakefulness.
0
0