﹣Why are the windows so dirty?﹣Because we __________ them for a long time.A. have cleaned B. haven’t cleaned C. didn’t clean
Shirley is glad she’ll take_________ eight-day trip to Italy.
—Tom, I don’t have a soccer ball. Let’s play ______ ping-pong. —OK. I have two ping-pong bats.
She has ________ good sense of humour and never says _______ bad word about anyone.
This is ________ orange. __________ orange is yellow.
—What’s matter? —I have toothache.