Instruction

Select the best answer to complete the sentence.

1. Water and air pollution is a big problem -------- all over the world.

2. This vending machine’s main power is -------- on the rear of the unit.

3. Our company specializes -------- producing speakers for car audio systems.

4. We are writing a specification in -------- to make the plan of a new job.

5. Would you mind -------- the window?

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