Đề thi Tiếng Anh 8 Học kì 2 có đáp án (Đề 5)

Ballpoint pen is a pen that has, as its name says, ball at its point which rotates when dragged

20/24

Was this invention commercially viable?

0/3000 ký tự
Giải thích

Đáp án là: No, it wasn’t.