1) The river ... (freeze) if it ... (be) cold. a) freeze b) freezes c) is d) does 2) If you ... (heat) water, it ... (boil). a) heat b) heats c) boil d) boils 3) If you ... (touch) a hot kettle, you ... (burn) your hand. a) touch b) touches c) burn d) burns 4) If you ... (mix) red and yellow, you ... (get) orange. a) mixes b) mix c) gets d) get 5) If he ... (not water) this plant, it ... (die). a) don`t water b) doesn`t water c) dies d) die 6) Ice ... (melt) if you ... (hold) it in your hand. a) melt b) melts c) hold d) holds 7) The ground ... (get) wet if it ... (rain). a) gets b) get c) rain d) rains 8) Ice cream ... (melt) if you ... (heat) it. a) melt b) melts c) heat d) heats 9) If you ... (mix) blue and yellow, you ... (get) green.  a) mix b) mixes c) gets d) get 10) If Sue ... (not wear) a cap, she ... (get) sunstroke. a) don't wear b) doesn't wear c) gets d) get 11) You ... (breathe) slowly if you ... (be) relaxed. a) breathe b) breathes c) am d) are e) is 12) If you ... (mix) water and oil, the oil ... (float) above the water. a) mix b) mixes c) float d) floats

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