There are _________of nurses in our school but only _______of them are boys.

______ was reported in the local paper, since the carrying out of the performance salary, efficiency in work has ______doubled.

The worst disaster happened _____ 14:28 _____May 12 in Sichuan. [ ]

The Whites ___________ many places of interest since they came to China.

______ you in America in 1999?—Yes, I ____________.