The factory used 65 percent of the raw materials, the rest of which _____ saved for the other purpose.

 How many countries ________ the European Union made up of, do you know?

There was a fire last night and more than one house _____ burnt down in the fire.

No one in our class but Tom and I      that a new teacher is going to teach us English．

—Each boy and each girl     talking about optional courses（选修课）.—Yes! And the each     their favorite one!