12月7日，淮北市灰霾发布黄色预警信号．全省范围内，早晚的雾霾愈发明显．雾霾天气能见度很低，给道路交通和市民出行带来不便．如图为城区在浓雾中若隐若现．回答下题．

    Charlie Chaplin was born in a poor family of music hall performers in 1889. ____ astonished us was that Charlie ____(teach) to sing as soon as he could speak and dance as soon as he could walk. Such training was common in acting families at that time, ____ (especial) when the family income was often uncertain. Unfortunately his father died, leaving the family even worse off. By his teens, Charlie had become one of the most popular child actors in England. No one was ever bored ____(watch) him—his subtle acting made everything ____(entertain). As time went by, he began making films. His film character, the little tramp, was a social ____(fail) but was loved for his optimism and determination ____(overcome) all difficulties.

    Charlie wrote, directed and produced the films he ____(star) in. In 1972 he was given ____special Oscar for his outstanding work. He lived in England and the USA but spent his last years in Switzerland, ____ he was buried in 1977. He is loved and remembered as a great actor who could inspire people with great confidence.

汽油机是热机中的一种，如图所示是汽油机的____ 冲程，此过程是将内能转化为____ 能。某汽油机飞轮的转速是1200r／min，该汽油机每10秒钟做功____ 次。若该汽油机的效率是25%，在汽油机内完全燃烧2kg汽油时这些热量通过汽油机的转化，能对外做____ J的有用功（汽油的热值为5×10⁷J/kg）。