______ number of the students in their school is about two thousand, ______ of them are boys.

I still remember the day_______ I was admitted(录取) to the key middle school.

Tell John not to leave the house unless he _________ that thelights_________

Who cooks dinner in your home every day —- _________ .

160. It seemed that there was strange sound outside. We ________ carefully but_____nothing.