大学体验英语(三)

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　Course 3 > Grammar > Tense>v-ing and v-ed>Being + V-ed, Having + V-ed, Having Been + V-ed　　│Text│Exercises│

		Exercises Directions: Fill in the blanks with the appropriate forms of the verbs in the brackets. 1) (finish) his work, he took a rest. 2) The question (discuss) is very important. 3) All the papers (correct), the teacher went to bed. 4) (promise) to help her, how could he go back on his words! 5) Everything (prepare), we began to make our experiment.