A．About four million.B．About seven million.C．About five million.D．About six million.

How many men college graduates are there in the USA？A．About 3 million.B．About 7.3 million.

Pigeons can carry messages for about ______.A．two weeksB．four weeksC．two yearsD．four years

What does the passage tell us about current insurance policies？A．Only four types of polici

Which of the following is INCORRECT about the four British men？A．They are being examined b

Paragraph Four is mainlyA．narrating about a fact.B．describing characters.C．recording an ar

Which of the following is true about the four－year study？A．The subjects are overweight pat