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

Câu hỏi

They had to bring in an outside specialist to install the computer system, ______?

A. hadn't they

B. weren't they

C. didn't they

D. haven't they

Đáp án
C. didn't they

Câu hỏi thuộc Bài tập:

ĐỀ MINH HỌA TỐT NGHIỆP 2025