______ senators vote for the bill.A．30.B．60.C．39D．21

______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

In "Who do you think the principal will vote for？", do you think is the ______ of the sent

For the students younger than 21, ______.A．they are the favorite customers of the credit c

U. S. senators serve for______years after they are elected.A．fourB．sixC．threeD．two

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