UNIT 6: THE PERFECT TENSES: FORMS AND USESQuestion 1 / 28
请完成全部题目，最后查看答案与解析
GRAMMAR · C1
Exercise 1 · Exercise 1
Choose the correct—or the most natural—verb form to complete each sentence. Choose the best answer.
C1 Advanced · GRAMMAR LESSONS
Unit 6: The perfect tenses: Forms and uses
3 exercises · 28 original questions
CEFRA1—C2Every level · Every skill