Why didn’t you go to yesterday’smeeting—I would have but I ______ too busyworking on the important experiment.

Please tell me ___________________an hour ago.—He rode his bike.

Whendid you become a volunteer for the elderly?–Two years ago. I this groupsince then.

Study hard, ______ you won’t catch up with your classmates.

You should tell ________ possible to support yourideas.