团队精神的核心是[ ]
A．集体主义
B．个人主义
C．爱国主义
D．国际主义
答案：A
The boy ________ his book here and forgot ________ it home.
A．left, took
B．left, to take
C．forgot, brought
D．forgot, to bring
选择管件的依据是什么？
