Instruction
Select the best answer to complete the sentence.
1. For -------- information, ask the secretary at front desk.
2. Our English teacher -------- that students should only speak English in class.
3. We have been trying to -------- the air pollution output from our plants.
4. The time for -------- is over. Now we have to move on.
5. Do not be afraid of -------- mistakes when you speak in a foreign language.
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