Question

【題目】 Clouds are made of small drops of water or tiny pieces of ice. The water and ice in clouds come from the Earth ’s surface，especially from lakes，rivers，and oceans. Water on the surface is heated. It changes into a gas called water vapor(水蒸氣). Water vapor goes up into the air.

The higher up you go，the colder the air gets. When water vapor gets cold，it changes back into drops of water. If it gets cold enough，the water changes to ice. When the drops of water and bits of ice are so small，you see the water and ice in the sky as clouds. Scientists who study weather divide clouds into three families. Three families are called high clouds，middle clouds，and low clouds.

High clouds are made of bits of ice. High clouds can be 5 miles or more above the Earth’s surface. Rain and snow do not fall from these clouds.

Middle clouds are made of drops of water. They form about 2 to 4 miles up in the sky. You can see through them，but you can’ t see the Sun and the Moon clearly because of them.

Low clouds are made of drops of water. Most low clouds are less than a mile high. Rain or snow usually falls from these clouds.

【1】Where do the water and ice in clouds come from?

The water and ice in clouds come from____________.

【2】When does the water vapor change back into drops of water?

When water vapor____________，it changes back into drops of water.

【3】Why can’ t you see the sun and the moon clearly?

You can’t see the sun and the moon clearly because of _____________.

【4】What does “It” refer to in the first paragraph?

It refers to______________.

【5】Where does the rain or snow usually fall from?

Rain or snow usually falls from________________.

Answer 1

【答案】

【1】the Earth’s surface

【2】gets cold

【3】middle clouds

【4】water

【5】low clouds

【解析】

這篇短文主要講述了云的相關(guān)知識(shí)，科學(xué)家把云分為三類。三個(gè)家族被稱為高云、中云和低云。

【1】題干“云中的水和冰是從哪里來(lái)的” 根據(jù)文中“The water and ice in clouds come from the Earth ’s surface” 云中的水和冰來(lái)自地球表面。come from…來(lái)自，這里是來(lái)自地球表面；故答案為the Earth’s surface。

【2】題干“水蒸氣什么時(shí)候會(huì)變成水滴？”根據(jù)文中“When water vapor gets cold，it changes back into drops of water.” 當(dāng)水蒸氣變冷時(shí)，它會(huì)變成水滴。根據(jù)下文“it changes back into drops of water.”可知，此處是“當(dāng)水蒸氣變冷”。短語(yǔ)get cold變冷。主語(yǔ)是不可數(shù)名詞，謂語(yǔ)動(dòng)詞變第三人單數(shù)。故答案為gets cold。

【3】題干“為什么你看不清太陽(yáng)和月亮？”根據(jù)文中“Middle clouds are made of drops of water. They form about 2 to 4 miles up in the sky. You can see through them，but you can’ t see the Sun and the Moon clearly because of them.” 中間的云是由水滴構(gòu)成的。它們?cè)诳罩行纬纱蠹s2到4英里。你能看穿它們，但因?yàn)樗鼈兡憧床磺逄��?yáng)和月亮�？芍�，這里是因?yàn)樗鼈兡憧床磺逄��?yáng)和月亮，because of由于……的原因，because of middle clouds由于中云。故答案為middle clouds。

【4】題干“第一段中“它”指的是什么？”根據(jù)上文“ Water on the surface is heated.” 表面的水被加熱�？芍�，此處it指的是水。water名詞，水。故答案為water。

【5】題干“雨或雪通常從哪里落下？” 根據(jù)文中“Low clouds are made of drops of water. Most low clouds are less than a mile high. Rain or snow usually falls from these clouds.” 低云是由水滴構(gòu)成的。大多數(shù)低云的高度不到一英里。雨雪通常是從這些云上落下的�？芍�，雨雪通常是從低云落下的。low clouds低云。故答案為low clouds。