What do you think of the TV play?-Wonderful. It is worth___ a second time.

Danny said that he would be a doctor _______ two more years. [ ]

We __________ used (使用) computers many years ago, but now they’re everywhere.

This kind of computer was _____ expensive _____ we had to buy another kind. [ ]

.It ________ I arrived at the station ________ I found the train was delayed.