Traffic police in Cambodia have not _________ traffic laws for four months due to the election and have been strongly appealed to resume conducting _____________ for traffic violations. (enforce)
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With tons of imitation (仿造的), synthetic (人造的) diamonds pouring into the market, it has become necessary to establish a diamond ____________method by which fake and synthesized diamonds can be clearly _________.(identify)
The doctor couldn’t explain the _____________ of his high temperature. What’s worse, the __________ cough and headache led to his continual insomnia (失眠).(persistent)
The essence of ___________ is the attempt to control the animal instincts of humans to build a better life. Until we understand that, all our efforts to _______ ourselves are doomed to failure. (civilization)
Rich in folklore and stunning scenery, such a vast island is sparsely __________ by about 1,000 people. It retains a relaxing, friendly atmosphere towards outsiders, especially those from __________ regions. (populate)