He lived in London for 3 months, during ______ time he learned some English.
26. Jerry, why ______ you leave your things on the floor like this?
25. When Jack reached the station the train ______ for ten minutes.
24. After ______ seemed a long time, Mr. Li stood up and broke the silence.
23. Allow others the space to voice their opinions, ______ they are different from yours.
20. Could ______ that have a say in the decision do us a favor about the problem?