1) If you heat water at 100°, a) they understand the topic b) he gets green. c) it boils. 2) If he mixes blue and yellow, a) they understand the topic b) he gets green. c) it boils. 3) If students pay attention, a) they understand the topic b) he gets green. c) it boils. 4) If you don't do homework, a) he arrives late. b) he gets green. c) the teacher gets angry. 5) If she doesn't get up early a) she arrives late. b) he gets green. c) the teacher gets angry.

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