(Viên chức Mầm non) 5000+ câu trắc nghiệm Ngoại ngữ có đáp án - Test 2

By the end of this year, Chen __________ English for three years.

48/65

By the end of this year, Chen __________ English for three years.

will be studying

will have been studying

has studied

has been studying

Giải thích

Đáp án đúng là b