Unit 1 PersistenceFull in each blank with a word given below. Change the form where necessary. (P8) bend encounter avail tumble swipe attempt blow1. Although we have tried very hard to achieve the goal,we still encounter great difficulties in our work.虽然我们很努力来达到我们的目标,我们仍在我们的工作遇到很大的困难。2. I have tried all kinds of ways , but still cannot bend my daughter to my will.我已经尝试了各种方式,但仍然不能让我的女儿屈从于我的意志。3. It is natural that babies tumble when they are learning to