The United Nations appeals to the world community to make combined efforts to solve the problem of pollution.
A. takes a legal action
B. pleases, attracts, or interests
C. makes a strong request
D. asks casually
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This technician is able to diagnose the engine problem simply by listening.
A. identify
B. solve
C. avoid
D. produce
A very virulent form of this disease appeared in Vietnam
A. strange
B. very bitter
C. very dangerous
D. weak
There was a big protest against the company's experiment on live animals.
A. small
B. living
C. lovely
D. rare
Continual strikes triggered a period of industrial unrest.
A. depression
B. demonstration
C. troubled state
D. reform