Choose the best answers to complete the following sentences.

Câu hỏi

One of the first sites that __________ to UNESCO’s World Heritage List was Yellowstone National Park in the United States.

A. adding

B. to add

C. was added

D. added

Đáp án
C. was added

Câu hỏi thuộc Bài tập:

E11- GS- U6- Lý thuyết về mệnh đề to + V (động từ nguyên thể)