He was admitted to our school two years ago, a top school in our hometown, _____ he has been crazy about reading electronic novels, killing time.

A．after that

B．since that

C．after when

D．since when

20世纪50年代，中国政府提出的解决国与国之间问题的基本准则是

A．求同存异

B．和平共处五项原则

C．互不侵犯

D．反对霸权主义