30.—Why did you leave the lights burning? —Heavens! I guess I__________to turn them off.
is not easy to find a best friend in a new place.
The student ____ can speak good English is my best friend.
The kids were very happy as they could get tickets .
-- Do you mind my opening the window? It's a bit hot in here. ---___________, actually.
_______, we had to feel the way out.