There are a number of safety procedures ______ which you should be aware.
A.about
B.in
C.of
D.on

Choose the underlined part among A, B, C or D that needs correction.Despite of (A) a language barrier, humans (B) have managed to communicate with others (C) through sign language, in which (D) certain motions stand for letters, words, or ideas.
A.Despite of (A)
B.in which (D)
C.with others (C)
D.humans (B)

Radio stations at which (A) broadcast only news (B) first appeared (C) in the (D) 1970s.
A.appeared (C)
B.only news (B)
C.at which (A)
D.in the (D)

JKL Motorbikes sells (A) six different models, the first which (B) they started (C) making (D) in 1985.
A.which (B)
B.started (C)
C.making (D)
D.sells (A)

Visitors were (A) not permitted entering (B) the park after dark because of (C) the lack of (D) security and lighting.
A.entering (B)
B.because of (C)
C.lack of (D)
D.were (A)

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