In many parts of the world the only _______ water supply lies below the ground.

“Every student should regularly experience the ‘Aha!’— when something you never understood，or something you never knew was a mystery, becomes clear. ”

“置于儿童不能拿到之处。”

在中国一般的城市家庭由三个成员组成——父亲、母亲和孩子。

母亲从不屈服于在我成长过程中遇到的困难。

那次不寻常的经历使鲍勃变成一个耐心、宽容的人。

It’s only a(n)_______meeting，and you don’t have to be in full dress. (formal)

Never indulge in _______as it's harmful to your health. (drink)

我只不过是想关心别人，也希望受到他人的关心，我的要求并不过分。

_______helps one to go forward. (modest)

The professor gave a very _______lecture on the market economy yesterday. (inform)