用恰当的关联词将两句话连成一句话。

丝绸之路是一条商贸大道。

丝绸之路是一条友谊之路。

①蚯蚓---体壁 ②鲫鱼-----鳃 ③家鸽----肺和气囊

④青蛙----鳃和皮肤 ⑤家兔-----肺

阅读短文，判断对（T）错(F)

     I'm Lingling. I have got a new bike. It's a nice bike. I go to school by bike every day. My mother is a teacher. Her school is near our home. So she walks to work. My father is a doctor. He goes to work by car.