Beijing's first unmanned subway trains, which can run ______ without the control of any drivers, are expected to be put into operation next year.
Of the seven days in a week, Saturday is said to be the most popular __________ for a wedding in some countries.
One thousand dollars a month is not a fortune but would help cover my living __________.
He and his wife are of the same __________; they both want their son to go to college.
I can’t say which wine is best—it’s a(n) __________ of personal taste.
When she first arrived in China, she wondered what the future might have _________ for her, but now all her worries are gone.