В каждом предложении выберите грамматически правильный вариант из предложенных.Например: Have you (saw / seen) him? = Have you seen him?
1. The students have no difficulty in doingto do the exercise.
2. I am teachinghave been teaching here for three years.
3. Does he resemble toresemble his mother or father?
4. HoweverAlthough he didn't like her, he invited her out.
5. I'm sure there's no secret between you and Iyou and me.
6. Never I have seenNever have I seen such bad accident.
7. He was hunghanged for murder.
8. John, as well as his brother, isare coming to the party.
9. It's mandatory that he isbe there on time.
10. He didn't go to the party. Now he regrets not having donenot have done so.