军警不分，警政合一是古代警察的特点之一。 ( )
参考答案：对
-Where's Jack?
-He _________ Beijing on business.[ ]
A. has been to
B. has been in
C. has gone to
D. had gone to
I don't like .
A．late
B．be late
C．to late
D．to be late
