Doctor Smith has made another wonderful discovery, _______ great importance.
| A．which I think is of | B．which I think it is of |
| C．which is I think | D．I think which is |
October 1, 2009 is a special day, _____ I think, that will be remembered by all the Chinese forever.
| A．which | B．what | C．it | D．one |
Admiral (海军上将) Hu Yanlin said that security demands required China to have its own aircraft carrier, and _______ any country had the right to build one.
| A．which | B．that | C．what | D．whether |
By the middle of August, a national campaign was underway ________ drunken drivers.
| A．dealing with | B．to do with | C．to deal with | D．doing with |
. -- Jack _______ for work in the downtown. What was the matter?
-- _______, but he had no luck.
| A．ought to have hunted; So he was | B．ought to have hunted; So he did |
| C．ought to hunt; So he has | D．ought to hunt; So he did |
What __ public is concerned about is whether the scientists win be able to find _____ cram for the disease.
| A．the; a | B．the; / | C．/; a | D．/; the |