It’s really a(n)         that Tony, a child of only two, can play the piano so well.

(2014·德州模拟)You’d better take into account your own________and weaknesses before choosing a major.

There are three ____ doing research work in the company.

You should read the ______in the car repair manual(手册)carefully before you start.

I’ m sorry. I can’ t give you the telephone number without Mr. Smith’s______.(合肥市)