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Section B (1a－Self Check) 重点单词1.convenient 2．corner 3.politely 4.request 5．direction 6.correct 7．polite 8.direct 9．speaker 10.whom 11．impolite 12.address 13．underground 14.course 单词变形1.convenience 2．incorrect；correctly 3．impolite；politely 重点短语1.parking lot 2．ask for help 3．communicate with sb. 4．each other 5．such as 6．lead into 7．look forward to 重点句型1.corner 2．requests 3．include 4．communicate; with 5．happened 6．thank you for 7．looking forward to 8．wake up