选字填空。

  门   闪    问

①老师____我叫什么名字。

②天上的星星____  ____发亮。

③____外的小河很清澈。

    There is a man and he calls the police when he loses a pet. He a lways asks the police to help him look for it.

    “I lost my pet bird，”he tell the police one day.“She can sing songs. Can you find her for me?”

    “I'm sorry，”the policeman says.“It isn't our job（工作）to look for birds. If you leave a window open in your house，the bird may come back.”

    Another time，the man calls the police and says，“I lost my cat. （A）你能帮我找到他吗？He can  talk. ”

    “I'm sorry，”the policeman says.“（B）It isn't our job to look for cats. You should put the telephone down quickly. Maybe（也许）he is calling you now and tells you where he is. ”

某交流电源电动势随时间变化的规律如图所示，现用该电源对标称值为“5V　10W”的电动机供电，电源内阻不计，下列说法正确的是（   ）