单词拼写（共10小题，每小题1分，满分10分）
【小题1】Some metals expand when it is hot and ccontract when it is cold.
【小题2】If you aadd a little salt to the soup, it will taste more delicious.
【小题3】Everyone can get on well with him, because he is easy toapproach (接近).
【小题4】They are making a survey (调查） of the population growth of the city.
【小题5】While I was doing my homework, the electricity (电） went off.
【小题6】Water is a liquid (液体）without color or taste.
【小题7】Children should be independent (独立的）in doing things and don't always rely on their parents.
【小题8】Iconcentrate (集中）your mind on study, and you'll make progress.
【小题9】What is the average (平均的）rainfall for summer in your country.
【小题10】Nowadays many old people don't like living ddowntown ,for it is very noisy.
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解析：
【小题1】时态是一般现在式，contract动词，意思“缩小”
【小题2】时态是一般现在式，add…to…固定句型，意思“往…加…”
【小题3】be+adj+to do sth固定词组，意思“做某事…”，approach动词接近
【小题4】make a survey固定句型，意思“做调查”，survey名词调查
【小题5】the后面加名词，electricity名词电
【小题6】冠词后跟名词，liquid名词液体
【小题7】be动词后跟形容词，independent形容词解放的
【小题8】时态是一般现在式，concentrate动词集中，主语不是第三人称单数，所以用动词原形
【小题9】因为后面有名词rainfall，所以用形容词average平均的
【小题10】downtown名词，商业区，live downtown意思“住在商业区”