We will be for ______ promises to volunteer to help us solve the puzzling problem.
#31994
A
whoever
B
any one of them
C
those who
D
anyone
推荐题目
____ ,but he still could not understand it. 
#32468
A
Told many times
B
Having been told many times
C
He had been told many times
D
Though he had been told many times