下列句子中的低效短语已加粗，提出一个有效的替代词或短语：1)

题目描述

下列句子中的低效短语已加粗，提出一个有效的替代词或短语：1)In view of the fact that you have not responded tO our letters，we have no alternative.2)We must at the present time send your account to our colicction agency·3)Due to the fact that a strike has temporarily closed our factory，deliveries are delayed.4)We find it necessary to inform all customers with regard to delivery delays.5)In the event that you are unable to attend，please notify us at once.6)We have received your check in the amount of $450.7)In spite of the fact that production costs are rising we have tried to maintain our current pricing schedule.8)We find that we must at this point in time reconsider our prices9)For the purpose of more efficient record—keeping，we will begm writing invoices in triplicate.10)If the estimate is in the neighborhood of $100 or less，the repair can be made immediately.