--- ______ hard work you have done!　

--- It’s very kind of you to say so.

A. What            B. How         C. What a       D. How a

—__________ hard work you have done!

— It’s very kind of you to say so.

A. What             B. How         C. What a            D. How a

—________ hard work it is!

—Yes, but he seems _____ to do it.

A. What a , happy    B. What , happy    C. What a , happily    D. How , happy

_______ hard work it is! I can’t do it by myself.