Instruction

Select the best answer to complete the sentence.

1. Please put on your coat -------- to catch a cold.

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

3. Naomi set a -------- by being the first Asian to win the U.S. Open tennis championship.

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

5. We will wait here until Tim --------.

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