单项选择题

Questions 19 to 21 are based on, the conversation you have just heard.

A．A pre-test is required.
B．A data-processing course is required.
C．A day course is required.
D．A college diploma is required.

<上一题目录下一题>

热门试题

填空题

frequently

Questions 19 to 21 are based on, the conversation you have just heard. 您的浏览器不支持 audio 元素。