Have you finished yourfashion design —Not yet. I’ll finish it if I ________ ten more minutes.

Sam _____ some knowledge of the computer just by watching others working on it.

When people cut down big trees, new trees should be planted. ,they will have no trees to cut down in the future.

Generally speaking, students’ inner motivation withhigh expectations from others essentialto their development.

This summer holiday I did an English coursewhich ____ for four weeks.