– He _____Hongkong. He____ there for three days.
A:has gone to, has been in
B:has been to, has been
C:has gone to, has been
D:has been to, has been in
若m、n互为相反数,则式子|m﹣ 5 +n|=____.
下图是骨针和装饰品,它反映了山顶洞人( )