题目内容
______
A. The law of immigrants.
B. The environment for companies.
C. The number of work visas.
D. Higher salary and better titles.
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______
A. Growing population.
B. Packaging materials.
Changed eating habits.
D. Lower production cost.
______
A. By saving energy.
By using less aluminum.
C. By reducing poisonous wastes.
D. By making the most of materials.
______
A. We are running out of natural resources soon.
B. Only combined efforts can make a difference.
C. The waste problem will eventually hurt all of us
D. All of us can actually benefit from recycling.
______
A. Join a tourist group.
B. Choose a major airline.
C. Avoid trips in public holidays.
D. Book tickets as early as possible.
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