已知m,a都是实数,且a≠0,则“m∈{-a,a}”是“|m|=a”的[ ]
A.充分不必要条件
B.必要不充分条件
C.充要条件
D.既不充分也不必要条件
答案:B
––_______ did Midori give her concerts around China?
–– At the age of eight.
A.When
B.What time
C.Who
D.Why