--Mr. Black this is our language lab. Would you like to go in and have a look?--OK.. A. H

问题补充：

--Mr. Black, this is our language lab. Would you like to go in and have a look?

--OK..

A. Help yourself

B. This way, please

C. Follow me

D. After you

答案：

A. Help yourself

B. This way, please

C. Follow me

(答案→)D. After you

解析：考查交际用语，A 请自便 B，请这边走 C 请跟我走 D 你先走

句意为，--布莱克先生，这是我们的语音室，你要进来看一看吗？---好的，你先请。