－How is Helen in the new school?－She is doing very well. There is         to worry about.

Generally speaking, clothes made of man-made materials is less comfortable than _____ made of natural fibers like cotton, wool or silk.

 —Shall I sit at this end of the boat or the other end? —If you keep still, you can sit at _____ end.

There are lots of flowers on ______ sides of the street.

You can find whatever you need at the shopping centre, ___ is always busy at the weekend.