People are puzzled _____ they read the book.A.the first timePeople are puzzled _____ they read the book.A.the first time B.at the first time C.for the first time D.at first which and why?

问题描述:

People are puzzled _____ they read the book.A.the first time
People are puzzled _____ they read the book.
A.the first time B.at the first time C.for the first time D.at first
which and why?