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

Câu hỏi

It was not until people became interested in e-books that e-readers became______________ around the world.

Đáp án
B. popular

Câu hỏi thuộc Bài tập:

UNIT 5: INVENTIONS - VOCABULARY AND GRAMMAR (1) - Bài tập Tiếng Anh lớp 10 - Global Success