Instruction

Select the best answer to complete the sentence.

1. The survey shows that the -------- of air pollution for residents is worse than expected.

2. If it -------- to rain, the field trip would be postponed to next week.

3. Customer reviews indicate that many modern mobile devices are often unnecessarily ------- .

4. While you are on a business trip to Ukraine, you are expected to take -------- to ensure your own safety.

5. Are you going to postpone -------- a questionaire on our customers?

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