How much did the guy ______ you to fix your bicycle?— I don’t remember,but it was quite a lot.

The room is dirty— I knowIt ______ for several weeks

__ mothers couldn’t go to themeeting, because they have gone to Shanghai .

The committee is discussing the problem right nowIt will _____ have been solved by the end of next week

A good student is honest and kindto others. In other words, he never ____ his friends.