These are plastic bags. Don’t ____.
We should think more of others if we want to ______ them.
—I feel really tired.—______.
—Can you tell the differences between these two pictures?—Differences? Oh, no. They look quite ______.
—What were you doing when we were playing basketball yesterday afternoon?—I ______ the classroom.
______ our teacher was ill,______ she still came to our class to teach us.