The panda's ______ habitat is the bamboo forest.
A.nature
B.naturalized
C.naturally
D.natural

Animals shouldn't be ______ for recreation and entertainment.
A.killed
B.captured
C.scattered
D.responsible

14 percent of primate species are highly ______.
A.dangerous
B.danger
C.endanger
D.endangered

It’s important for the developed countries to reduce energy _____ as much as possible.
A.waste
B.destruction
C.consumption
D.exhaustion

There are over 2,000 varieties of snake______ are harmless to humans.
A.most of them
B.mostly they
C.most of which
D.which most

Choose the word that has main stress placed differently from the others.
A.encourage
B.cultivation
C.discourage
D.responsible

To _____ it may concern.
A.who
B.which
C.that
D.whom

It was the kind of accident for ______ nobody was really to blame.
A.which
B.whom
C.that
D.who

The woman about ______ I am telling you teaches me English.
A.who
B.that
C.whom
D.which

Pioneers, ______ in isolated areas of the United States, were almost totally self-sufficient.
A.that I lived
B.lived
C.living
D.who living