______of the U.S. Senate stands for re－election every two years.A．4／5B．3／4C．2／3D．1／3

The members of the Senate are elected for______years.A．twoB．threeC．fourD．six

The cultivated land in the U.S. makes up______of the total land, and people who are engage

In the United States, the Senate is presided over by______of the United States.A．the presi

In the Senate of the U. S., the terms of______of the senators expire every two years.A．one

Between the two dense bushes __________ the residence of the old hermit.[A]stand[

The influence of business in the U.S. is evidenced by the fact that ________. A.mo