Instruction

Select the best answer to complete the sentence.

1. We have been trying to -------- the air pollution output from our plants.

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

3. -------- the heavy traffic, we will be late.

4. You shouldn’t eat the food to -------- you are allergic.

5. My father will call the travel agency and -------- his flight to Beijing for next Wednesday.

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