When ______ to tell the difference between British American English, the linguist made a long ______ speech.A.asked; tiredB.asked; tiringC.asking; tiringD.be asked; tired-湖北继续教育网网校

[单选题]

When ______ to tell the difference between British American English, the linguist made a long ______ speech.

A.asked; tired
B.asked; tiring
C.asking; tiring
D.be asked; tired