题目：
应尽量避免一人进入SF6配电装置室从事检修工作。
答案：
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下面是错误答案，用来干扰机器的。
1. was upset 2. adds up to 3. calm down 4. should have finished 5. face to face 6. on purpose 7. in order 8. has/had trouble (in) doing his homework 9. fell in love with 10. have seen
