He looked as though he _________ a ghost（鬼）.
| A．saw | B．has seen | C．have seen | D．had seen |
Don’t respond to any emails________ personal information，no matter how official they look.
| A．searching | B．asking | C．requesting | D．questioning |
A competent speaker of a language must have a(n)________ of these different styles.
| A．comment | B．observation | C．command | D．response |
The film，________ the true story of this Red Army general，attracted people’s interest all over the country.
| A．is based on | B．is on the base of |
| C．which is the base for | D．based upon |
________for a long time，but he tried his best to make up for what he missed.
| A．Being ill staying in hospital |
| B．Having been ill staying in hospital |
| C．He was ill staying in hospital |
| D．To be ill staying in hospital |
________ from heart trouble for years，Professor White has to take some medicine with him wherever he goes.
| A．Suffered | B．Suffering | C．Having suffered | D．Being suffered |