16. under this__1__pressure some of the rocks even became liquid.
a. intensive
b. weighty
c. intense
d. bulky
17. of course, most immigrants did not get rich overnight, but the__1__of them were eventually able to improve upon their former standard of living.
a. maximum
b. minority
c. majority
d. minimum
18. nancy was surprised that they have__1__. they seemed to be a happy couple.
a. split up
b. broken down
c. fallen through
d. knocked out