下列计算正确的是 [ ]
A．a2+a2=a4
B．a4·a4=a16
C．﹣a4·（﹣a）2=a6
D．（﹣a2）2=a4
答案：D
Singing English songs made me ______ English. [ ]
A. interested to learn
B. interest in learning
C. interested in learning
D. interesting in
