This is the man with ____ (who, whom) we must talk. Yesterday we had a meeting, at ____(where, which) Thomson gave us a presentation. The reason ____ (that, why) Jack failed in testing the machine is that he did not conduct the test as he had been required. September and October are the two months ____ (which, when) hotel rates are highest. 5·Is this the book ____ (what, /) he bought last week?