The old town has narrow streets and small houses _____are built close to each other.
It was not until near the end of the letter she mentioned her own plan.
After the Arab States won independence, great emphasis was laid on expanding education, with girls as well as boys _____ to go to school.
I’ve worked with children before,so I know what _________ in my new job.
________ these experiments were successfully completed would we think of going into humans.