1.多读书对孩子们很有好处。

Reading more books is __________ __________ __________ __________ children.

2.他匆忙地赶往学校，就在这时，他看到了以前的老同学。

He was hurrying to school ____________ he ____________ ___________ __________ his former classmate.

3.空气中过多的二氧化碳使得地球上的热无法释放到太空中去。(prevent)

Too much carbon dioxide ___________ ___________ ______________ ______________ from the earth to space.

4.一种普遍被人们所接受的理论是：宇宙起源于一次大爆炸，它将物质投射到四面八方。

    According to _______ _____________ ______________ ____________, the universe began with a “Big Bang” __________ threw matter __________ ____________ _______________.