I should very much like to have gone to the party but I _________.
| A．am not invited | B．am not being invited |
| C．shall not be invited | D．was not invited |
With the help of high technology, many new substances（物质）______in the past years.
| A．discovered | B．have discovered | C．had been discovered | D．have been discovered |
I’m certain David’s told you his business trouble. ________, it’s no secret that he owes a lot of money to the bank..
| A．However | B．Anyway | C．Therefore | D．Though |
---- Will Joe attend the party? ----- If his wife won’t go to the party,_________.
| A．he will either | B．neither does he | C．he neither will | D．neither will he |
----- Can I go back home now? ----- You______ to leave until you ______ your work.
| A．won’t allow; finish | B．won’t be allowed; will finish |
| C．won’t be allowed; have finished | D．won’t allow; will finish |
----- Are you used to______ in the north with the old couples?
----- Yes, I am glad to find out that coal is used______ electricity for home use.
| A．live; to produce | B．living; to produce | C．to live; produce | D．living; producing |