阅读理解：The undersea world is very beautiful.Now more and more

46.Why do people want to dive in the sea?Because ______.A.they want to catch fish
B.they want to find the secrets of the undersea world C.the sea is deep
D.there are all kinds of plants in the sea
47.In the daytime,when you dive in the sea,you ______.
A.can see everything green and blue B.can't be in danger C.can catch nothing D.can’t see anything clearly 48.How many dangers will animals meet in the deep sea A.One.B.Two.C.Three.D.Four.49.When you do scuba diving,you can______.A.stay in deep water for a long time B.dive very,very deep C.live in deep water easily D.dive freely without any dangers 50.Which of the following is WRONG?
A.One animal finds something to eat,and it may be eaten by others.
B.At the depth of 3,000 feet under the sea,many animals can find their way by hearing and feeling.
C.The deeper the sea is,the darker and colder it is.
D.At the depth of 3,000 feet under the sea,all animals can find their way by seeing.
46~50 BACAD

海底世界是很美的。如今越来越多的人想潜水。

海底世界很漂亮，现在越来越来多的人想去在水中潜泳。