单项选择题
A.duty B.responsibility C.obligation D.share
If you（）bright sunlight（）dry wood with a glass, it will...
单项选择题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
When he was a young boy, a serious disease deprived him...
单项选择题When he was a young boy, a serious disease deprived him of the（）of hearing.
A.organ B.possession C.conduct D.faculty
Stamping on any country's national flag is an（）to its p...
单项选择题Stamping on any country's national flag is an（）to its people.
A.inflation B.ingredient C.insult D.invasion
