It is so difficult a problem that _____ student in this class _____ work it out.
| A．any, can't | B．no, can | C．every, can | D．no, can't |
-- You shouldn’t have made _________ appointment with her that you couldn’t keep.
-- What _________ pity! It was not my fault. It was she who was to blame.
| A．an; the | B．the; a | C．an; a | D．the; the |
Was it _________ she said or something that she did ___________ you were angry at so much?
| A．what; that | B．that; which | C．that ; what | D．what; which |
_________left before the deadline, it doesn’t seem likely that John will finish the job.
| A．Though such a short time | B．Because such a short time |
| C．With such a short time | D．As such a short time |
He made another wonderful discovery, _________ of great importance to science.
| A．which I think is | B．which I think it is |
| C．which I think it | D．I think it is |
Without facts, we can’t form a correct opinion, for we need to have actual knowledge________ our thinking.
A． which to be based on |
B．which to base on |
| C．on which to base | D．which to base |