Bộ 15 Đề thi học kì 1 Tiếng anh mới 12 có đáp án- Đề số 1

We managed to finish the exercise on time and passed the exam. ________, it was very difficult.

13/50

We managed to finish the exercise on time and passed the exam. ________, it was very difficult.

But

However

So

Therefore

Giải thích

Chọn đáp án B