题目内容：

I once experienced an unforgettable trip to Gloucester to see some of the world’s most beautiful and exciting animals in their own habitat(栖息地), the North Atlantic Ocean.

After a long trip by bus, we got on the ship. After a while, we stopped and everyone began to shout because we saw a humpback whale（座头鲸）. It was wonderful. Sometimes, whales came so close to the ship that you thought you could easily touch them.

While we were watching the whales, a guide was giving us some information about them, She told us that we saw only two kinds of whales- 50 foot humpback whales (singing whales) and 70-foot finback whales(the second largest whales on earth). She also said we could easily recognize a whale by its tail because every whale has a different kind of tail just like people have different fingerprints.

They all have names,and on this trip we saw “Salt” and “Pepper”, two whales named by a biologist and a fisherman. They were swimming toghter all the time.

I took twenty-seven photos,but it was very hard to take them because the whales were quick and stayed on the surface of the ocean just for a short time. It was really something. It was one of the chances that a person hardly ever experiences in life, but I had that chance.

1.This passage is mainly about _________________.

A an unforgettable experience in the forest

B an unforgettable trip to see some strange animals in the mountains

C a long trip on the ship

D an unforgettable trip to watch whales

2.Everyone on the ship began to shout because_____________.

 A a whale came so close to the ship

 B they saw a singing whale

 C they saw a finback whale

 D they could touch the whale

3.When they were watching the whales, __________________.

 A some of them fed the whales

 B they found several kinds of whales

 C a guide told them something about the whales

 D some of them took many photos and touched the whales

4.How can we recognize a whale?

 A By its tail                B By its head

 C By its neck               D By its eyes