John is the only one of the students in our class that never ______ a mistake even when it is pointed out to him.
As the twentieth century, come to a close, the raw. materials for a great national literature were at hand, waiting_______.
With the help of high technology, more and more new substances____in the past years.
—You speak very good French! —Thanks. I __________ French in Sichuan University for four years.
—Why don’t we choose that road to save time? —The bridge to it __________.
--Do you want a lift home?---It’s very kind of you, but I have a much late in the office. I overslept this morning because my morning clock _______.