Nobody ___ Tom and John ___ how to run the machine.

—He is the only one of the students ______from the country in my class, and we have known for quite some time.—Where did you meet for the first time?     —It was on the farm ________ I used to work.

—Remember that where and when two different English question words___________. —I see, but can you tell us how to use them, sir?

Here       a set of keys and here        my books.

 He has donated some money to those who________ in poverty, which   of great help.