1. It is the question _____ she can persuade her daughter to give up the idea of getting divorced _____ concerns the old woman.
A. that; which               B. which; that
C. that; whether              D. whether; that 
2. Could you tell me _____ made him so angry yesterday?
A. why is it that              B. what is it that
C. why it was that             D. what it was that