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1. I was shocked when the (principal / principle) gave us an extra recess.
2. Since he was the sole (heir / air) to the family's estate, he inherited a mansion.
3. Without my morning (serial / cereal) I am grouchy by nine.
4. Instead of adding (flour / flower) to the batter, he added cornstarch. What a big mistake!5. If you don't (know / no) a definition, you can always look it up in a dictionary.
6. He sat (idol / idle) for so long, he started to doze off on the bench.
7. While I was trying to (pore / pour) the lemonade into the cups, I spilled it on the floor.
8. After the garage sale, we counted a (profit / prophet) of two hundred dollars.
9. I wanted to write a thank you letter on nice (stationary / stationery), but I could only find loose leaf paper.
10. The devoted fans (waited / weighted) in line for their One Direction tickets.
11. That GPS system came in handy when we didn't know (where / wear) to turn for your house.
12. Because of the surgery, Mark's muscles were (weak / week), and he needed some intense rehabilitation.