(Viên chức Mầm non) 5000+ câu trắc nghiệm Ngoại ngữ có đáp án - Test 1

The students ________ off the land when they tried to camp there.

49/60

The students ________ off the land when they tried to camp there.

have warned

warned

were warned

had warned

Giải thích

Đáp án đúng là c.