teering is becoming popularin China.七彩教育网–Yeah, people are now aware that helpingothers is helping themselves.七彩教育网

One of the great things about science is that it has taught us to be __________about surface appearances. The world seems flat, but it is, in fact, round.

Our manager never fails to answer a phone call______ she is very busy

With some books ________， he went into the bookstore on the way home.

In those hard days, we could not leave behind________came to us for help.