The students in our school each an English dictionary.　　

s said that Frank is very rich and is always changing his private cars .What is he–_______ of a manager, I am not sure.

See the flags on top of the building? That was _____we did this morning. [ ]

Peterwas so excited hereceived an invitation from his friend to visit Chongqing

Beijing has improved a lot these years. —-_______ and ________.