34.More and more parents find ______ a headache to regulate the time their children spend on the Internet. 
(A)it
(B)that
(C)them
(D)there

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統計： A(61), B(28), C(3), D(4), E(0) #418996

詳解 (共 1 筆)

#623612
越來越多的家長發現它一個頭痛來調節他們的孩子在互聯網上花費的時間。
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