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Unit 2 Period 4 一、 單項(xiàng)選擇。 ( ) 1. This pair of jeans looks nice _____Sandy because she looks very nice ____ blue. A. on ,in B. in ,on C. for ,on D. to ,in ( ) 2. If you walk into a room with blue walls ,you will feel ____,because blue is a calm colour. A. excited B. stressed C. surprised D. relaxed ( )3. Everyone knows ________humans need water, food and air to survive. A. if B. that C. What D. it ( )4. Mr. Zhang is not sure ________he can get support from others. A. wheth