（The farmer) knows something that the whole （civilized) mankind seems （to have forgotten),

We need to know something about the structure and operation of science because___

We need to know something about the structure and operation of science because （)．A． it i

In many cases, without delivery confirmation, the sender knows that something was sent

Which of us ______ knows something about physics does not know this？A．whoB．whatC．whomD．tha

－ Would you please let me know something more about the project －（)

Once upon a free a poor farmer taking a sack of wheat to the mill did not know【C1】______to