1. ... was backed up for miles on the freewaya. yesterday
b. in the morning
c. traffic
d. cars

2. engineers... for work in the new space program
a. necessary
b. are needed
c. hopefully
d. next month

3. Henry Adams, born in Boston, ... famous as a historian and novelist.
a. became
b. and became
c. he has
d. and he became

4. if ultraviolet radiation enters the earth's atmosphere, ... generally blocked by the ozone.
a. it
b. it is
c. so it is
d. then it

5. scientists are now beginning to conduct experiments on... trigger different sorts of health risks.
a. noise pollution can
b. that list pollution
c. how noise pollution
d. how noise pollution can

6. were... millions of dollars each year replenishing eroding beaches, the coastline would be changing even Were more rapidly.
a. the U.S. Army Corps of Engineers not spending
b. the U.S. Army Corps of Engineers not spend c. the U.S. Army Corps of Engineers does not spend
d. not spending the U.S. Army Corps of Engineers

7. ... of chamber music is the string quarter.
a. the famous most form
b. the form most famous
c. the most famous form
d. most the form famous

8. alfalfa is... for livestock.
a. a primarily grown crop
b. a crop grown primarily
c. grown primarily a crop
d. a grown crop primarily

9. the Franklin stove, which became common in the 1790s, burned wood... an open fireplace.
a. efficiently more than much
b. much more than efficiently
c. much more efficiently than
d. more efficiently much than

10. rarely... located near city lights of at lower elevations
a. observatories are
b. are
c. in the observatories
d. ate observatories

mohon bantuannya..​