He is having a lot of difficulties, ?
A. doesn’t it
B. isn’t it
C. isn’t he
D. doesn’t he
KEY C
Giải thích: câu hỏi đuôi, vế trước khẳng định vế sau phủ định, không thay đổi về mặt thời động từ.
Dịch: Anh ấy đang gặp rất nhiều rắc rối, có phải không?
Put plants ............... a window so that they will get enough light.
If you can give me one good reason for your acting like this, _____ this incident again.
His teacher regrets _______ him that his application for the job has been turned down.