下列说法正确的是（　　）

选项填在下面的空格中：①氧气②二氧化碳③水蒸气④氮气⑤氖气⑥空气

唯一包含其他五种气体的混合物是　 ____　；

可用于制染料和氮肥的是　 ____　；

能使澄清石灰水变浑浊的气体是　 ____　；

饼干在空气中会受潮变软是因为空气中含有　 ____　；

充入测电笔中可产生红光的是　 ____　；

可用于急救病人的是 ____．

    Tom's school basketball game is next month. His class 1 a new player. His teacher asks him to be one. of the players 2 he is tall (高的). But Tom doesn't like 3 sports. He can't play basketball 4 and he thinks it is 5 for him, so he calls his friend Edward to help him. Edward says he'll help Tom 6 his basketball skills (技巧). They have about 20 days to prepare for (为……做准备) the game, and in the next three 7 they play basketball for 2 hours a day. They don't have much 8 at school, so they play it after the classes 9 .Tom is tired (疲倦的) but happy every day. Now, Tom loves 10 He thinks it is relaxing and fun.

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