下列计算正确的是 [ ]
A.a·a3=a3
B.a2·a3=a6
C.(a2)3=a5
D.a5+a5=2a5
答案:D
He wants _____ a teacher when he is older.[ ]
A. to do
B. to be
C. to is
签发现金银行汇票,申请人和收款人必须均为个人。