the making of cloth	CHANGE TO	making cloth
the manufacture of steel	CHANGE TO	manufacturing steel
many of the countries	CHANGE TO	many countries
several of the countries	CHANGE TO	several countries
some of the countries	CHANGE TO	some countries
fill up the tank	CHANGE TO	fill the tank
lay out the pipes	CHANGE TO	lay the pipes

Note that these recommendations can sometimes change the meaning. If they do, let the original construction stand.