________ he studied hard, he didn't pass his final exams.
Đáp án A
Câu này về nghĩa mang tính chất đối lập giữa 2 vế
Although (mặc dù) + mệnh đề
Ann's encouraging words gave me _________ to undertake the demanding task once again.
In the US the first stage of compulsory education _________ as elementary education.
The local people insisted that the road_________50 cm more so that, in case of flood, they still can travel on it.