What were you doing this time yesterday—I ____on the grass and drawing a picture.

. We have finally finished it! When ______ the job if we had started it a week earlier?

This problem seems so ______ that no one can work it out ______.

ked Peter and ____ of his two sisters,but none of them knew when their uncle came back.

always been honest and straightforward,and it doesn’t matter ___ I’m talking to.