6．Can dolphins talk?They can't talk with words.but they talk wilh sounds．They show their feelings wi——青夏教育精英家教网——

6．Can dolphins talk？They can't talk with words，but they talk wilh sounds．They show their feelings with sounds．
Dolphins travel in a group．We call a group of fish a"schoo1"．They don't study，but they trave1 together Dolphins are mammals，not fish，but they swim together in a school．
Dolphins talk to the other dolphins in the school．They give information．They tell when they are happy or sad or afraid．They say"Welcome"when a dolphin comes back to the school．They talk when they play．
They make a few sounds above water．They make many more sounds under water．People cannot hear these sounds because the sounds are very，very high．Scientists make tapes of the sounds and study them．
Sometimes people catch dolphins for a large aquarium．People can watch the dolplains in a show Dolphins don't like to be away from their school in an aquarium．They are sad．
There are many stories about dolphins．They help people．Sometimes they save somebody's life．Dolphin meat is good，but people don't like to kill them．They say that dolphins bring good luck．Many people believe this．

Answer the following questions according to what you read．
76．Can dolphins talk with words？No，they can't．
77．What do we call a group of fish？A"school"
78．When do they say"Welcome"？when a dolphin comes back to the school．
79．Do they make more sounds above water or under water？Under water
80．In fact，do dolphins really bring good luck？Why？No，they don't．Because it's just a wish of many people．．

5．政府在治理大城市的雾霾天气方面取得了一些进展．
The government hasmade someprogress in dealing with smog in large cities．

4．青少年的心理问题和考试压力大有一定关系．
Teenagers'mental problems have something todowith the stress from tests．

3．购物时要记得查看食品外观是否有损坏或闻着是否有异味．
When shopping，don't forget to check if your food looks orsmellsbad．

2．I have drunk two glasses of milk till this morning．（对画线部分提问）
Howmuch milk have you drunk till this morning？

1．Professor Smith did a very interesting experiment in his lab yesterday．（改为一般疑问句）
Did Professor Smithdo a very interesting experiment in his lab yesterday？

20．I can't go to school wearing that---everyone willlaugh（取笑） at me．

19．It's notpolite（礼貌） to talk with your mouth full while eating．

18．-Do you remember Mary the money you borrowed from her？
-Yes，I will give it to her this afternoon（　　）

17．-How's your journey to Yunnan？
- is wonderful except our car broke down twice on the way．（　　）

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