Overeating and lack of regular exercise easily _____ overweight and high blood pressure.

ay find the key to the math problem on page 107．—Ah, it’s so simple． I wonder whyI _ of that．

下列各句中，加点的成语使用不恰当的一项是（）

It is difficult for a teacher to give _____ attention to children in a large class.We should reform the situationin order to meet each child’s needs.[ ]

Lovely weather, isn’t it?— Yes, a bit hot, ______