It'snecessaryforthephubbers（低頭族）to    thetimetheyspendo...

問題詳情：

It's necessary for the phubbers（低頭族）to     the time they spend on their smart phones．

A．cut in  B．cut off C．cut down  D．cut up

【回答】

C

知識點：動詞和動詞短語

題型：選擇題