—What has ________ done since 1989?. —It has built many schools for poor children .
Do you still remember the key points that ___________ in his report? I don’t remember them all.
When he was doing the software development project, he ___________ many problems that he had to solve on his own.
____________ scientists will be invited to take part in this space flight.
The old teacher lay wide awake on his bed, ___________ all the problems he had to deal with the next day.
I am one of the students who _________ English well in my class but he is the only one of us __________ maths well.