It was ______ in the exam that ______ how much time I had wasted.
| A．not until I failed;I realized | B．until I failed; I didn’t realize |
| C．not until I failed; did I realize | D．until I failed; I realized |
Nowhere else in such a small town,I think, _______ a book as good as this one.
| A．can you get | B．you can get |
| C．you get | D．you will get |
—Never _______ in line to get on a bus.
—Is it not until you mention me _______ I know of it?
| A．forget to wait; while |
| B．to forget waiting; which |
| C．forget waiting; that |
| D．forget to wait; that |
Hardly _______ to sleep when _______ the door.
| A．had I gone；someone knocked at |
| B．I had gone；did someone knock at |
| C．had I gone；did someone knock at |
| D．did I go；someone knocked at |
Never before in China _______ for the unemployed.
| A．has done so much |
| B．has been done so much |
| C．so much has been done |
| D．has so much been done |
_______ was only then I reread his theory recentlyI began to appreciate their value.
| A．until | B．that |
| C．then | D．so |