执行（）操作时，加油机系统启动。
A、设置加油金额
B、设置加油量
C、按开始键
D、按启动键
参考答案：D
What's wrong _____ your clock? [ ]
A. on
B. with
C. of
D. to
Could you describe the speaker’s recent activity
A．He’s never lonely, for he has worked in his own company.
B．He started a business after he had gained some experience.
C．He’s upset about his own business for three years.
D．He needed to spend three more years working with the IT firm.
