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第3版 CHECKING CORNER Part 1 L. 1. fastened 2.tolerated 3.carriage 4. optimistic 5.surrounding 6.aspect 7. sideways .8.previous 9. tablets 10. timetable II. 1. uncertain 2. opening 3. constantly 4. adjustment(s) 5.impressionm.1.① flashing②2flash2.① Qguided② guide3.①lack 2lacks4.①masks②mask5.① Dpress② 2pressed IV. 1. sweep/ clean up. 2. switch/turn off 3. slid into 4. lost sight of him 5. took up the lesson Part 2:1.1.lost/Having been lost 2. visited 3. Invited .4.given 5. Known