1.   Different amino acids combine to form proteins.

2.   Hydrogen and oxygen combine to form water.

3.   In some minerals two single chains are combined to form double chains, in which the chains are linked by cations.

4.   On these pages we review some of the recent commercial successes which combine to form the foundation of our new business.

5.   Sulphur dioxide and nitrogen oxide combine to form acid rain.

6.   Ten British and French companies combined to form the Channel Tunnel Group.

7.   The experiment went wrong when the chemicals combined to form a poisonous gas.

8.   These three trends combined to form a more environmental physical geography which May have been late but hopefully not too late.

9.   Water flowing over the ground surface as overland flow cuts channels, and these channels combine to form a stream network.

10.   The California Farm Bureau and several chemicals companies combined to form an opposition group, the Careful Initiative, dubbed the Big Brown by environmentalists.