We are learning English, but how can we learn English well? A student can know a lot about English, but maybe he can not speak English.
If you want to know how to swim, you must get into the river. And if you want to be a football player, you must play football. So , you see, you can learn English only by using it. You listen to your teacher carefully in class. You must read your lessons every day. You must speak English to your English teacher and classmates and also you must write in English. Then one day, you may find your English very good.

达尔文的进化论否定了上帝创造物种的神创论，摧毁了各种唯心的目的论和物种不变论，不仅带来生物学上的革命，而且带来了哲学上的革命。这说明（    ）

完形填空
    One Saturday morning, John and his mother went 1 a shoe shop 2John a pair of new shoes. Mrs. Lee put her bag on a chair3she looked at some shoes. She could not see 4she liked and went away. Suddenly(突然) she said, “Oh, my bag, someone 5it away!” All the other people in the shop stopped 6 and looked at her. John ran after the man at once(立刻). A few minutes 7 , John came back with 8. He 9 it to his mother. She opened the bag and had a look in10.Then she said,“ Oh, god, nothing is lost.”

This is a photo of my sister and she is ____ (十九) years old.

如图，在直角∠O的内部有一滑动杆AB，当端点A沿直线AO向下滑动时，端点B会随之自动地沿直线OB向左滑动，如果滑动杆从图中AB处滑动到A′B′处，那么滑动杆的中点C所经过的路径是（   ）