We ________ last night, but we went to the concert instead.

I often hear the girl ______ beautifully next door. When I passed by the door, I heard her ______ just now.

There is a common belief among the students in ourschool ______ they should make great efforts to learn and reach the peak oftheir academic performances

leaving office in 1999, Nelson Mandela didn’t stop doing he thought was right.

During the rainy days, I prefer to stay at home ___________ go out.