________ many times，I still didn't know how to operate the machine.
| A．Having taught | B．Having been taught | C．Being taught | D．Teaching |
—Why is Mr. Li so happy this morning?
—Because he was honoured with a(n)______ for excellence in teaching.
| A．present | B．gift | C．award | D．reward |
The news that he won the game sounds.
| A．encouraged | B．encouraging | C．encourage | D．to encourage |
----I’ll tell Mary about her new job tomorrow.
---- You_____ her last week.
| A．ought to tell | B．would have told | C．must tell | D．should have told |
This depends uponhe is interested in doing this kind of work.
| A．if | B．whether | C．that | D．what |
I was about to leave the officean unexpected visitors came.
| A．while | B．as | C．when | D．before |