问题
单项选择题
呼吸系统是由（）发展出来的。
A.外胚层
B.中胚层
C.内胚层
D.羊膜囊
答案
参考答案：C
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呼吸系统是由（）发展出来的。
A.外胚层
B.中胚层
C.内胚层
D.羊膜囊
参考答案：C
| 阅读下列短文，选择可以填入空白处的最佳选项。 | ||||
| My name is Martin. Years ago, I went to Michigan in the United States __1__ an exchange student. I wanted to improve my English and learn about the culture there. __2__, I learned something else: When you are in trouble, you should believe love is here and there. On the 26th of August, my host family __3__ me up from the airport in a big American car. In the car, I did not talk much __4__ my English was poor. And I tried to answer their questions fast and go to bed early. The first week at my new home was OK. The following weeks, I __5__ that the family was really strict and cold. One day, the son of the family __6__ a baby parrot as a gift. Later on, the bird was really sick. But the child told his mom it was because every night, when __7__ was sleeping, I poured some dirty water straight at the bird. My host mom __8__ the lie (谎言) of her son and my sad life there started. Then one day the parrot was __9__. I had to leave the home. The family all thought I killed it. __10__, I made more friends in the school and I could move to live with them. They gave me love when I was in trouble. Now, I visit them once or twice a year. | ||||
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