根据句意和所给首字母补全单词。（共15题，每小题1分，满分15分）
小题1:Milk, water and oil are all l_____ while wood, iron and glass are solids.
小题2:You can easily find the site by entering the k_______ “Quark”.
小题3:Water is recognized as the s_____ of all life. Without it, there would be no life.
小题4:She was born in a (富裕的) family.
小题5:The old man had no a________ to education when he was young.
小题6:Helen is____________ (担心的) about traveling on her own.
小题7:I think it’s only an o_________ camera and I needn’t pay such a high price for it.
小题8:Living in the business d_______ of a city provides a great convenience for shopping.
小题9:As students, we must c____________ our attention on our lessons.
小题10:People are concerned about the quality of the air they___________ (呼吸).
小题11:Children should be encouraged to be __________（独立的）thinkers.
小题12:Helen is the most diligent shop____________ (助手) that I have ever seen.
小题13:She lost the d_______ necklace that she borrowed from one of her friends.
小题14:She has read many of the major works of _________ (文学).
小题15:The _________ (百分率) of overweight people around the world has been increasing these years.
小题1:liquids
小题2:keyword
小题3:source
小题4:wealthy
小题5:access
小题6:anxious
小题7:ordinary
小题8:district
小题9:concentrate
小题10:breathe
小题11:independent
小题12:assistant
小题13:diamond
小题14:literature
小题15:percentage
小题1:. Liquids 考查名词 句意牛奶，水和油都是液体而木头，铁和玻璃是固体。
小题2: keyword 考查名词句意你可以通过关键词Quark很容易找到地址。
小题3:source 考查名词 句意 水被认为是生命之源，没有它，就没有生命。
小题4:wealthy 考查形容词 句意 她出生富裕之家。
小题5:access 考查名词句意这个老人当他年轻时没有接受教育。Have access to 有。。的机会。
小题6:anxious 考查形容词句意海伦很担心一个人旅行。Be anxious about 担忧。
小题7:ordinary 考查形容词 句意 我认为这是个普通的相机，我没有必要出很大价钱。
小题8:district 考查名词 句意，住在商业区给购物提供了很大的便利。
小题9:concentrate 考查动词。句意 作为学生，在上课时我们必须集中注意力。Concentrate on 集中注意力于。
小题10:breathe 考查动词 句意 人们非常关心他们所呼吸的空气质量。They breathe 是the air 定语从句。
小题11:independent 考查形容词。句意 孩子们鼓励做个独立的思考者。
小题12:assistant 考查名词 句意 海伦是我见过最勤奋的助手
小题13:diamond 考查名词 句意 她丢了她借来的钻石项链。
小题14:literature 考查名词 句意 她读过很多的文学著作。
小题15:percentage 考查名词 句意 近些年，肥胖的人的百分率在不断上涨。