--- I rang you at about ten, but there was no reply.--- Oh, that was probably ____ I was seeing the doctor.
Wu Juping, ______ the most beautiful mother, is also popular with foreigners for her saving the baby _________ off the high building.
__________ to the left at the crossroads, and you will see the railway station on your right.
He got up late and hurried to his office, ______ the breakfast untouched.
Unfortunately, the research was limited __________ increasing economic profits, _________ protecting the environment.
The speech ____________ by Professor Smith was so interesting that the students talked about it all that day.