The city ________ against the terrible possibility of such things happening again.
—Jack, can you make a sentence to ________ the meaning of the new phrase? —Well…
—Shall I lock the lab now before I go home ? —__________ . I’ll check it myself later.
—Really? Who will give _________ lecture? — Mr. Wang, ________ professor from Nanjing University.
This problem is said_____ three times at the meeting. However, they haven’t arrived at a conclusion now.
At present there is a fierce debate over the question_______ human cloning should be allowed.