第一单元答案Enhance Your Language Awareness Words in Action Working with Words and Expressions1. In the boxes below are some of the words you have learned in this unit. Complete the following sentences with the words given. Change the form where necessary. Answers:1) spark2) compelled3) bare4) scrape5) destruction6) output7) retreat8) tipped9) miracle10) eternal11) pile12) transfer13) mass14) thereby15) have emerged16) trigger17) threaten