I______ to see grandma and help her with some housework every week.
Private cars are required to take turns off roads one out of five weekdays ____the traffic pressure.
There is a saying ____swimming is a good way to keep fit.
This is a city which lives for today while ____ by its past.
In September 2008,China’s key milestone in space travel _____when Zhai Zhigang conducted the first space walk.
We _____ last night,but we went to appreciate the flowerbeds and streetlights in Tian’anmen Square instead.