None of the students watched the teacher______.
—The terrible accident is under investigation.—Actually, quicker action _____ those workers trapped in the mine.
While we were listening to the speech attentively, a voice _____ to announce the result of the election.
many times, but he still didn’t understand it.
The little girl ________ to be a good singer if she gets good training in a music school.
—You’ve made great progress in your English study, haven’t you?—Yes, but much .