64的平方根是[ ]
A.8
B.-8
C.±8
D.以上都不对
答案:C
The woman _________ all of her money to charities to help the poor.
A.gave on
B.gave up
C.gave away
D.sent for
请从所给的四个选项中,选择最合适的一个填入问号处,使之呈现一定的规律性:().
A.A
B.B
C.C
D.D