.
—Have you seen___________pen? I left it here this morning.
—Is it___________black one? I think I saw it somewhere.
| A．a, the | B．the, the | C．a, a | D．the, a |
A poet and artist _____ coming to speak to us about Chinese literature and painting tomorrow afternoon.
| A．is | B．are | C．was | D．were |
The father as well as his three children _____ skating on the frozen river every Sunday afternoon in winter.
| A．is going | B．go | C．goes | D．are going |
was most important to her, she told me, was her family.
| A．It | B．This | C．What | D．As |
According to a recent U.S. survey, children spent up to 25 hours a week ______ TV.
| A．to watch | B．to watching | C．watching | D．watch |
Progress so far has been very good. ______, we are sure that the project will be completed on time.
| A．However | B．Otherwise | C．Therefore | D．Besides |