- May I speak to Professor Black, please? - Sorry, but he is busy an experiment in the lab r——青夏教育精英家教网—

摘要： - May I speak to Professor Black, please? - Sorry, but he is busy an experiment in the lab right now. A. conducting B. working C. acting D. researching

网址：http://m.1010jiajiao.com/timu3_id_3159368[举报]

－May I speak to __________ Professor Black, please?

－Sorry, but he is busy conducting ____________ experiment in the lab right now.

A．the; an B．a; the C．不填; an D．the; the

查看习题详情和答案>>

试题分类