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

问题补充：

33. -- 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

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