阅读理解。 The sun is always shining. But it can only shine on one side of the earth at a time. It can not light up (照亮) the other side of the earth at the same time. All day the stars are in the sky, but the light from the sun is so bright that you can not see them. When the sun is gone, the stars are bright enough to see. Stars look very small but some are even bigger than the sun. Big things look little when they are far away. In the sky planes look like toys. But on the ground you can see that they are big. Stars look very small because they are far away. The sun is closer to us than the other stars. So it looks bigger. 1. The sun looks large because ______. [     ] A．it's close to the earth B．it's always shining C．stars are bigger than it D．it's bright 2. ______, we can't see the stars in the daytime. [     ] A．Though all day they are in the sky B．Because they are not in the sky C．As they are gone D．When the sun does not shine on them 3. The stars are bright enough to see ______. [     ] A．when the sun shines on them B．when they become bigger than the sun C．when they shine on the earth D．when the nights come 4. When the sun shines on the earth, ______. [     ] A．the whole earth is bright B．one side of the earth is bright, and the other side is even brighter C．one side of the earth is bright, but the other is dark D．one side of the earth is dark, and the other side is even darker 5. Which of the following is not true according to (根据) this passage (短文)? [     ] A．The sun is not so big as some stars. B．Planes look like toys in the sky because they are small. C．Of all the stars, the sun is the nearest to the earth. D．The moon looks bigger at night than the stars because it is closer to us than the stars.