PART 4:

Mark the letter A, B, C or D to indicate the correct answer to each of the following questions

Câu hỏi

He regretted not _________ registered for military service last spring.

A. have

B. having done

C. having

D. having had

Đáp án
C. having

Câu hỏi thuộc Bài tập:

Grade 11_Unit 7_Test 1