We should participate in the movements_________ the natural environment.
Đáp án B
– movements organized to conserve (những động thái được tổ chức để bảo toàn …)
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.