Sorry to say I’m busy now and can’t help ______ the lab.
The housing problems we are looking forward to seeing _____ have attracted the government’s attention.
Oct.1st, is our National Day, is always celebrated with singing and dancing.
Young people go to college with the expectation that educated people get a higher pay.
With a travelling speed of up to 350 kilometres per hour, the railway to be built between Beijing and Shanghai _______ the journey time from 12 hours to 5 hours.
―Karen, can I talk to you for a minute? ―Sure, ________?