Everything to do with ______ nature can have______ important part to play in the development of man.
| A．the ; / | B．a ; an. | C．/ ; an. | D．the ; an |
_____ occurred to me that the murder happened ____ a rainy day.
| A．What; in | B．What; on | C．It; in | D．It; on |
It was ______ the old worker came that we______ the experiment.
| A．until；didn’t begin | B．not until; began |
| C．until; began | D．not until; didn’t begin |
In no city of China ______ little about the economic development.
| A．the government cares | B．does the government care |
| C．doesn’t the government care | D．the government doesn’t care |
---- ______ he dropped out of school?
----His family had run into financial difficulties.
A. Why was it that B. Why was that
C. Why was that it C. Why was it
I made up my mind that under no circumstances ______ agree to such a principle.
| A．would I | B．I would | C．I will | D．will I |