Try this:Making clouds ……

system through gas clouds that permeate the galaxy. These clouds could trigger climatic disaster... not panic yet." ……

  Some clouds weigh (重) as much as 85 elephants. Some clouds weigh (重) as much as 85 elephants.    ……

where tornadoes frequently occur. From April to October, whenever the clouds start to gather... was at a local restaurant. Suddenly someone rushed in, shouting: " We saw a tornado!" Panic was written ……

雨天的云为什么会变灰？雨天的云为什么会变灰？On sunny days, clouds are good at “bouncing off (弹开)” light. All the colors... clouds as white. But when it rains, clouds get thicker. Less light “bounces off” into your eyes. So ……

Across: 1. fruit 3. jacket 4. clouds. Down: 1. flowers 2. leaves ……

Key:Across: 2. fruit. 3. ……

核心词汇panic v. 恐慌，害怕The gunfire panicked the horse.进阶词汇previous adj.以前的reaction n. 反应 ……

. Scientists now know that clouds there play a really big role.Where on Earth has the cleanest air... because it is far from people. Scientists now know that clouds there play a really big role.NASAHow ……

A: The teacher asked you a question, but you didn't even hear him!B: Sorry, my head was in the clouds."Head in the clouds": 心不在焉。上课的时候可不能总是开小差呀！ ……

“心不在焉。”英语怎么说？Head in the clouds.例句: You should have been paying attention, but you had your head in the clouds. 你太心不在焉了，你可以更小心的。 ……

Counting the clouds that block your path to the sun有谁知道天上究竟有多少云彩？Q:How much of the earth is covered by clouds on an average day?A:More than 50 per cent of the earth is covered by clouds at any one ……

Now winter nights enlargeThe number of their hours,And clouds their storms dischargeUpon the airy towers. By Thomas Campion (English poet, 1567-1620) ……

Boats sail on the rivers, And ships sail on the seas; But clouds that sail across the sky Are prettier far than these. By C. G. Rossetti (English poet, 1830 – 1894) ……

云朵其实很重哦！Most clouds might look light (轻的). But they are heavier than you think. A cumulus cloud (积云) weighs about 500,000 kg. That’s as heavy as 100 elephants. Clouds look big but are actually made ……