.Few people paid full attention to their health conditions _____ they were seriously ill.
——Are you going to take part in the speech contest?——____________. It’s too good an opportunity to miss.
_____ the Internet is of great help, I don’t think it’s a good idea to spend too much time on it.
The number of foreign students attending Chinese universities _____ rising steadily since 1997.
If you sit near _____ front of the bus, you’ll have _____ better view of the rapidly changing city.
The car broke down, and I had to_____ on foot