英文高手請幫幫忙(閱讀測驗文章)

這是我最近很喜歡兩篇閱讀測驗文章，但知道他大致意思，由於我英文基礎不是很好所以選不出正確答案，麻煩英文高手幫幫忙！

David had a very strange dream last night. He was on a boat on some kind of underground river. It was very dark,he could see word__16___ on the walls.
___17___the names of girls in his class! And the boat kept ___18___faster. He was afraid it would turn over,and he thought he would drown. Suddenly,the river came out from under the ground into the bright sunlight. All those girls were there,___19____beside the river. He waved to them,but then he fell into the water and could not swim! Then he _____20_____. The very first thing he decided to do was sign up for a swimming course.
16.(A)written (B)writing (C)wrote (D)write
17.(A)There is (B)There was (C)They are (D)They were
18.(A)go (B)going (C)to go (D)goes
19.(A)that stood (B)stood (C)standing (D)that stand
20.(A)woke (B)woken (C)will wake up (D)wakes up

The dolphin is one of the _____16_____animals. The typical has a long,smooth gray body,____17________for swimming. The usual dolphin diet is made up of different kinds of fish. Dolphins have to eat a lot of fish every day to _____18______healthy. But dolphins are abie to catch fish easily because they are ____19______fast swimmers. They can swim up to twenty-five miles per hour! And they can see and hear very well. Dolphins are also very social. They usually live in small ____20____“pods”or“schools”.
16(A)smarter (B)smartest (C)smart (D)more smart
17(A)perfect (B)middle (C)heavy (D)similar
18(A)make (B)run (C)hold (D)stay
19(A)such (B)so (C)much (D)like
20(A)are called (B)calling (C)called (D)call