A number of students ________ for a rise since last year
Đáp án B
Có mốc since + mốc thời gian => sử dụng thì hoàn thành
A number of N được tính là danh từ số nhiều => sử dụng have chứ không sử dụng has
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.