【名词&注释】
矿泉水(mineral water)、感叹句(exclamatory sentence)、氯酸钾(potassium chlorate)、动词不定式(infinitive)、不可数名词(uncountable nouns)、不定冠词(indefinite article)、氯化铜溶液(copper chloride solution)、遇冷收缩
[单选题]在下列物质中，属于纯净物的是（ ）
A. 矿泉水
B. 空气
C. 氯酸钾
D. 氯化铜溶液(copper chloride solution)
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举一反三：
[单选题]3． Can you think of the best way ________his problem?
A. solving
B. solved
C. to solve
D. solve
[单选题]Why was Mrs. Green surprised? __________ .
A. Because her husband didn’t arrived the airport on time
B. Because her husband was still at the airport at 5 o’clock
C. Because her husband didn’t want to go to London
[单选题]下列事实，不宜用微粒之间有空隙的性质来解释的是（ ）
A. 铁路上的钢轨，受热膨胀，遇冷收缩
B. 1L芝麻与1L大米混合，总体积小于2L
C. 向一定体积的气体加压，体积明显变小
D. 向一定体积的液体加压，体积变化极小
[单选题]16．
A. can
B. need
C. must
D. should
[单选题]When will the party be held?--- ______ two weeks’ time, _____ 15th July.
A. In; on
B. In; in
C. On; on
D. At; on
[单选题]10．________exciting news! We will have__________- long holiday after the exam．
A. What an ;a
B. What ;a
C. How an ;the
D. How ;the
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