They _______ the train until it disappeared (消失) in the distance (在远处).

Walter offered us a lift when he was leaving the office, but our work ______, we refused his offer.

_________ did you work out the problem in such a short time—With Mr. Li’s help.

cent financial crisis _______ intoconsideration, the Japanese boss ______ back on the number of workers workingfor him.

It is in the school ______ he studied ten years ago ______ he gave a wonderful speech.