In the experiment we kept a watchful eye ________ the developments and recorded every detail.
| A．in | B．at | C．for | D．on |
The artist was born poor,poor he remained all his life.
| A．and | B．or | C．but | D．so |
Heas a national hero for winning the first gold medal for his country in the Olympics.
| A． | regarded | B． | was regarded | C． | has regarded | D． | had been regarded |
——I can’t find my purse anywhere.
——You have lost it while shopping.
| A．may | B．can | C． should | D．would |
to reach them on the phone, we sent an email instead
| A．Fail | B．Failed | C．To fail | D．Having failed |
--May I ask a question after class, Sir?
--, but not during my lunch break.
| A． | I'm sorry | B． | Anytime |
| C． | Sure | D． | Go ahead |