---- Wasn’t it Dr. Wang who spoke to you just now?---- ____.
—I’ m sorry that I have broken your glasses. — ____________!
______ is often the case, we have worked out the production plan.
The flu is believed _____by viruses that like to reproduce in the cells inside the human nose and throat.
—How did you find the talk this morning? —______.
The flowers _________sweet in the botanic garden attract the visitors to the beauty of nature.