Reading passages

For centuries dam design was based upon 
previous experience. Remains of ancient earth-fill 
dams still exist in India and Sri Lanka. The 
earliest recorded dam is believed to be a masonry 
structure 49 feet high that was built across the 
Nile River in Egypt around 2900 BC. A rockfill 
dam built around 1300 BC in what is modern 
Syria is the oldest dam still in use. Dam builders 
in ancient Rome did not show the engineering 
genius that was employed in other projects, but 
Byzantine engineers utilized the Roman masonry 
arch to build a prototypical arch- gravity dam in 
550 AD. There was little dam building in Europe 
for several centuries; it began in earnest only 
when the Industrial Revolution gave rise to the 
need for water power in the 18th and 19th 
centuries.
220- It is stated, though indirectly, in the passage 
that today Syria ............. .
A) is one of the forerunners of dam-building 
technology 
B) has by far the most dams all over the world 
C) has the earliest type of dam which hasn't gone 
out of use yet 
D) was regarded as the cradle of dam building 
E) copied Egyptian architecture in its dam 
constructions 
221- According to the passage, the reason why 
dam building was started to be taken seriously is 
that .............. .
A) if floods were to be prevented, dams would be 
more necessary than anything else 
B) in Europe, new techniques in dam-building were 
devised 
C) until then, they were thought as potentially 
dangerous 
D) people didn't have enough experience to build 
formidable ones 
E) industrialization made people feel the necessity 
of water to run machines 
222- It is implied in the passage that ............ .
A) engineers in ancient Rome didn't use their 
talents, for they were underpaid 
B) there were structures in ancient Rome reflecting 
the excellent talent of their designers 
C) Roman engineers were lucky in that their designs 
had already been tested earlier 
D) no dam was built in Europe till 550 AD 
E) building techniques in ancient Rome was poor