What ______ public is concerned about is whether medical workers and scientists will be able to find for this new disease in a short time.
—I believe we've met somewhere before. —No, _________.
If by any chance someone comes to see me, ask them to have a __________.
They were surprised that a child should work out the problem ________ they themselves couldn't.
Mary has _______ a difficult question to me.
To the sea captain's surprise, he found that ________ travel could also be quite pleasant.