It was the first day of biology class. The teacher wanted to give a good 41 to his class. He wanted to 42 his students’ eyes to the world of biology. He knew that 43 young students was not easy, so he worked 44 and tried to find a good way to teach this class. 45 thinking for a long time, he made a 46 at last. He decided to show the kids something 47 and teach them a lesson at the same time. He asked his students to 48 carefully. Then he began. He put a worm(虫子) into a glass of water. The worm 49 around in the water. Then he put a second worm into a glass full of alcohol(酒精). It died at once. He asked the students if anyone knew about 50 they learned from it. A boy said, “You showed us that if we drink alcohol we won’t have worms.” 小题1: A．pay B．start C．day D．tour 小题2: A．go to B．open up C．call up D．keep out 小题3: A．sending B．fitting C．following D．teaching 小题4: A．hard B．quickly C．loudly D．alone 小题5: A．Before B．While C．After D．When 小题6: A．story B．decision C．cake D．face 小题7: A．crazy B．impossible C．strange D．interesting 小题8: A．watch B．use C．listen D．write 小题9: A．flied B．ran C．jumped D．swam 小题10: A．what B．how C．when D．why