– When do you think the lecture will begin? – I’m not sure yet but the speaker is to be

问题补充：

– When do you think the lecture will begin?

– I’m not sure yet, but the speaker is to be here before nine.

A. possible

B. probable

C. likely

D. perhaps

答案：

A. possible

B. probable

C. likely

D. perhaps

解析：可联系答.案.网客服索取。