A、  B、  C、  A句子是询问调查怎样进行的How疑问句。应该理解How…是“询问方法”的表达。

When is Mr. Adams coming to Canada?
(A)It’s a beautiful country.
(B)At the end of the month.
(C)Yes, he’s quite diligent.

How did you conduct your survey?
(A)By phone.
(B)A conductor for the orchestra.
(C)Too many questions.