单项选择题
The main topic of the passage is （）
A. conditions in the work place B. the freedom of industries in the past C. changes in industrial production D. the safety and health of workers and customers
单项选择题 Jenny is the only one of the grade who ()selected to school fashion-show team
单项选择题 "Evil Under the Sun", ()is a famous detective story, is written by a Christie.
单项选择题 The boy has four appels: two yellow() and two red
