Johnny studied in a university, and he a few dollars by doing odd jobs in his spare time.
Harry lived in London for three months,______ he learned some English.
Those boys _____ many times not to go on line, but it doesn’t make any difference.
Many old houses have been ____to make way for new roads.
____time,Chinese farmers have invented many farming techniques.
When he ran downstairs, he tried to avoid ____by the teacher.