_______ many times, he finally understood it. A Told B Telling C To told D Having been told
-It was the headmaster, Tony. You______hello to him. -Sorry. I didn't notice him.
Most parents still hold the view______students should first put their hearts into their lessons.
-Why has she pulled a long face to me? -Well, she seems to______about what you said about her.
Are they still doing the experiment? They're supposed______it by the end of last class.
-Hi, I didn't know you had come back! Have you finished your teaching in America? -Yes. I______Chinese there for more than two years.