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嘴巴还没有完全放开，再多读几遍才行；
You must have been driving at seventy miles an hour. 这里的miles应该是[ai]不是[i];
Didn't you see the speed limit? 这里的didn't读成了did；
charge读成了change；
next time you'd better take my advice! 这句的my和advice都没读对。
再练习几遍，继续加油！