Fill in the Blanks 

3231. In the stringed instruments , the tones ______ by playing a bow across a set of strings that may be made of wire or gut

A. They produce
B. Producing
C. Are produced *
D. That are producing

3232. During a degree based on libertal arts curriculum , it’s understood that graduates will _______ about english language , literature, history and the oher social science

A. Know *
B. Know how
C. Knowing
D. Knowledge

3233. According to geologists , a desert is any place which receives less than twenty five ______ of rainfall every year :

A. Centimeter
B. A centimeter
C. Centimeters *
D. Of centimeters

3234. _____ fuel that is used today is dervied from non renewable sources :

A. Most of
B. The most
C. Most of the *
D. Almost the

3235. It is a scientific fact that ________ at 212 degrees F and Freezes at 32 degree F.

A. Water boiled
B. The water boils
C. Water boils *
D. Water boil

3236. By the begining of the twentieth century, keeping firarms _____ a necessity in every home in america .

A. Became
B. Becoming
C. Had become
D. Had become *

3237. If you deprive humans of sleep, they hallucinations and anxiety .

A. Would expreince *
B. Experienced
C. Would have experienced
D. Had expereinced

3238. Although drug developers hoped that the newly invented medicine _________ to be a cure for HIV, its application now appear to be more limited .

A. Prove
B. Had proven
C. Would prove *
D. Will prove

3239. Solar flares are known to cause ________ enormous increase in the intensity of the sun’s gamma particle emission .

A. An *
B. A
C. Some
D. One

3240. Unemployment compensation given by the government is supposed to support an unemployed person while he is looking for _______.

A. Job
B. A job *
C. Works
D. A work