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. Most consumers judge which product is -------- quality, based on the price.
3. Crude oil and materials have risen -------- these days in addition to the increase in taxes.
4. -------- his age, he looks young.
5. The cost of living has been -------- steadily for the last six months.
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