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

_____ already busy in August, I would gladly accept your invitation.

36/55

_____ already busy in August, I would gladly accept your invitation.

Was I not

Were I not

If I am not

Unless I was not

Giải thích

Đáp án đúng là b.