题目

春天是放风筝的好季节。风筝在空气中飞行利用了下列什么原理:A.风筝下方空气流动速度小，空气压强小;B.风筝下方空气流动速度大，空气压强大;C.风筝上方空气流动速度大，空气压强小;D.风筝上方空气流动速度小，空气压强大. 答案：C34、Peter and Paul passed by a small house on their way home late at night. They saw thick  1 coming out of its windows. "It's on fire!" said Peter. "We must get help. " The two brothers ran 2   the road shouting "Fire! Fire! "They 3  on the door of the next house. They asked them to 4  the police and the firemen. They ran back to the house. They saw 5  the window an old lady sitting in an arm-chair. It was  6  that she could not move. Peter and Paul tried hard to carry her out of the 7 and so they did! Some neighbors （邻居）came and helped take some things out. In no  time  the  firemen 8  as  well  as  the policemen. The fire was put out. The old lady cried sadly 79 she was not hurt. She thanked Peter and Paul and her neighbors 10 . 1．A．snow               B．clouds              C．fire         D．smoke 2．A．over                B．along               C．at           D．with 3．A．knocked              B．beat                C．locked         D．opened 4．A．tell                 B．report               C．telephone        D．find 5．A．at                B．through               C．above         D．on 6．A．old                 B．difficult               C．free          D．clear 7．A．arm-chair              B．window              C．house        D．road 8．A．arrived               B．fought              C．left          D．returned 9．A．so                B．for                 C．and          D．but 10．A．up and down       B．again and again       C．hour after hour  D．from side to side