I spent some time _______ because I just didn't know which website was useful for me.
I spent some time _______ because I just didn't know which website was useful for me. (surf)
Đáp án đúng: surfing
Cấu trúc: spend time doing sth: dành thời gian làm gì
Dịch nghĩa: Tôi đã dành chút thời gian lướt web vì tôi không biết trang web nào hữu ích cho mình.