电视中的银簪子遇到所谓的毒物会变黑，实际上是生成了硫化银，古代的砒霜（三氧化二砷）实际上是用雄黄（三硫化二砷）加热得到的，纯度不高，里面含硫，因此用银簪子能试出来，化学方程式为2Ag+S═Ag₂S，则下列说法正确的是（　　）

45－(27－18)=____

请根据句意从方框中选择合适的单词，并用其适当形式填空，使句子通顺。

(1) Although the film____  was not interesting, Ann played the lead role very well.

(2)It was ____ for my father to talk so much at table that day. He is always quiet.
(3)Visitors can watch all kinds of birds ____  at Beijing Wildlife Park.
(4)Mr Black was a very good swimmer in his ____ .
(5)The other team played even ____ in the second half of the basketball final.

    Most children like to watch TV. It's very interesting. By(通过) watching TV they can see and learn a lot and know many things about their country and the world. Of course, they can also learn over the radio. But they can learn better and more easily with TV. Why? Because they can hear and watch at the same time. But they can't see anything over the radio.

    TV helps to open children's eyes. TV helps to open their minds, too. They learn newer and better ways of doing things. They may find the world is now smaller than before.

    Many children watch TV only on Saturday or Sunday evening. They are always busy with their lessons. But a few children watch TV every night. They go to bed very late. They can't have a good rest. How about you, my young friend?