Every time he had a chance，he would talk about the great difficulty he had _____ in the new country．

 ________ the meeting himself gave them a great deal of encouragement.

    She won’t come over for a visit unless________.

Up till now, full use of this theory has been ________ in building large ocean-going ships.

—What’s the matter with John? —He’s had his leg ______ trying to save a boy from a fire.