Swimmers must be very strong in order to build up speed because of the high resistance of the water Runners, ____, must struggle against the heavy resistance of the air and ground

We pay to get into the concert. It’s free.

In such a background, his white hair was particularlyhis dark skin．

_______ to looking after three children at home,she no longer has time to enjoy the various activities in the club.

was the organization created—In order to help the students in poor areas.