單項(xiàng)選擇題If you（）bright sunlight（）dry wood with a glass, it will start burning.
A.expose；to
B.concentrate；on
C.aim；at
D.focus；on
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1.單項(xiàng)選擇題When he was a young boy, a serious disease deprived him of the（）of hearing.
A.organ
B.possession
C.conduct
D.faculty
2.單項(xiàng)選擇題Stamping on any country's national flag is an（）to its people.
A.inflation
B.ingredient
C.insult
D.invasion
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In China,it is quite (nature)（） for people to go back home for the Spring Festival.
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