David was very unhappy for ____ to the party which was held in his cousin’s house.
| A．having not been invited | B．not having invited |
| C．not having been invited | D．having not invited |
—A cup of coffee, please?
---How do you like it?
| A．I like it very much. | B．I’d like it black. |
| C．It tastes a bit bitter. | D．I wouldn't leave it to you. |
---I am going to travel to English.Would you consider telling me about your experiences there?
---_____.Let’s discuss it over drink.
| A．That’s all right. | B．By all means. | C．Go ahead. | D．It just depends. |
What ______ public is concerned about is whether medical workers and scientists will be able to find_____cure for this new disease in a short time.
| A．不填;不填 | B．不填;the | C．the;不填 | D．the;a |
Having ended the major combat (主战), President Bush_____ rebuilding Iraq.
| A．started out | B．went all out | C．turned to | D．went on |
_____ private cars are bringing us convenience, they may also cause more traffic accidents and pollution.
| A．While | B．As | C．If | D．Since |