单项选择题
A. There is an empty apartment in his building. B. He usually washes clothes on Monday. C. He used the paint bought by his next door neighbor. D. Last week he bought a new lawn mower.
A. waking up late. B. changing a new job. C. making a mistake. D. taking medicine.
A. at the age of fifteen. B. before the age of fifteen. C. at the age of fifty. D. before the age of fifty.