800 câu trắc nghiệm Điền từ Tiếng Anh có đáp án - Phần 21

Presumably, most parents (2)_____ are always worrying about their children’s safety buy mobile phones for them to track their whereabouts. We can also assume that most teenagers want mobile p

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Presumably, most parents (2)_____ are always worrying about their children’s safety buy mobile phones for them to track their whereabouts. We can also assume that most teenagers want mobile phones to avoid missing out on social contact. In this context, the advantages are clear.

which

whom

who

what

Giải thích

C là đáp án đúng