23. Nowadays, children always complain that their parents are out of date, ______ parents can’t approve of what their children say and do.
The university is saving $ 300,000 per year by its energy ______ efforts.
— A US pilot says he saw a UFO in the shape of triangle, moving very low over bushes two days ago.— ______, but I didn't think that’s true.
— I really can't put up with what he said yesterday.—______. He was just joking.
So far, almost every possible means ______to provide accommodation and medical rescue for the people in the flood-stricken area.
______ at his final score, he decided to treat himself to a big dinner.