The sun heats the earth,（）is very important to living things.

A

When you look at the sky at night，the moon looks bigger than the stars． In fact，the moon is much smaller than the stars．It is much smaller than the earth． But the moon is much closer to us than any star． That is why it looks so big． If you hold a coin close．to your eye，it looks big．If you look at it across the room，it looks small．The moon moves around the earth． It makes one trip in about four weeks． The moon looks flat(扁的)to us． But it is a round ball，like the earth．People once thought the moon had fire(火) on it． They thought the fire made it bright．Now we know the moon is like a mirror( 镜子 )． It gets its light from the sun Our sunlight comes from the sun，too: What is the sun? The sun is star． The stars we can see have their own light． There are many big stars we can-t see． Their light has burned out． Others are still bright，but they are so far away that we can-t see them． The sun looks bigger and much brighter than other stars because it is the nearest of all stars． The sun and the other stars we see are very hot，but the air around us saves us from(使------免于) the heat(热量) of the sun．The sun gives us light and warmth．It makes plants grow and leaves turn green． It makes life possible on our earth．It is a life-giving star．

( )21． The moon looks bigger because__________ ．

A． some stars are smaller than it

B．it is between the sun and the earth

C．it is the closest to the earth

D．it is very bright

All the other five planets ________.

[A] always appear near the path of the sun

[B] are moving in a way more complicated than the earth does

[C] aren't moving around the sun as independently as the earth does

[D] are moving around the sun at the same speed as the earth does

A.in wherever

B.that wherever

C.where

D.that

The earth ____ around the sun.

A、revolved

B、revolves

C、is revolved

D、was revolved

The earth ______ round the sun in 365 days .

A moves

B moved

C is moving

D move

It is stated in astrology that ________.

[A] the sun is so distant from us that it was hard to follow its motion

[B] the sun was moving westward around the sky

[C] the motion of the sun is at the rate of about thirty degrees every week

[D] the motion of the sun is similar to the revolution of the earth around the sun

A、one of the suns’ planets

B、one of the sun's planets

C、one of the sun’s planet

D、one of the suns’ planet’s

The article suggests that______.

A. our earth exists before the sun

B. how space formed

C. no one knows where the earth comes from

D. our earth used to be part of a high mountain on the sun

VIP是以下哪组词的翻译

A. Very important place

B. Very interesting person

C. Very important person

D. Very interesting place

Neap tides occur ______.

A.at the start of spring, when the Sun is nearly over the equator

B.only when the Sun and Moon are on the same sides of the Earth and are nearly in line

C.when the Sun and Moon are at approximately 90°to each other, as seen from the Earth

D.when the Sun , Moon, and Earth are nearly in line, regardless of alignment order