22.　 America was ____ was first called “India” by Columbus.

21.　 See the flags on the building? That was_____ we did this morning.

20.　 Do you have any idea ___ is actually going on in the classroom?

19.　 A modern city has been set up in _____ was a wasteland ten years ago.

18.　 It is pretty well understood ____ controls the flow of carbon dioxide in and out the atmosphere today.

17.　 A computer can only do ____ you have instructed it to do.

16.　 _____we can’t get comes better than ____ we have.

15.　 It is generally considered unwise to give a child _____ he or she wants

14.　 ---Do you remember____ he came?　 --- Yes, I do, he came by car.

13.　 I remember ____ this used to be a quiet village.