完形填空。 What do you know about the sea? We have seen it. Some of us have swum in it. We know that it 1 very nice when the sun is 2 on it. We also know that it can be very terrible 3 it's windy. What other things do we know about it? The first thing to remember is that the sea is very big when you look at the map 4 the world, and you will 5 there is more sea than land. The sea covers three-quarters of the world. If you have swum 6 the sea, you' know that it is salty. You can taste the salt. __ 7 go into the sea and carry salt from the land into the sea. Some parts of the sea are saltier than 8 parts. (     )1. A. looks (     )2. A. light (     )3. A. what (     )4. A. for (     )5. A. think (     )6. A. in (     )7. A. River (     )8. A. another B. looked B. lighting B. tha B. to B. hear B. at B. Rivers B. other C. look C. shine C. where C. of C. find C. down C. Water C. others D. looking D. shining D. when D. in D. feel D. over D. Lake D. one