In questions below, each passage consist of six sentences. The first and sixth sentence are given in the begining. The middle four sentences in each have been removed and jumbled up. These are labelled as P, Q, R and S. Find out the proper order for the four sentences.

16.
S1:	Hungary, with a population of about 10 million, lies between Czechoslovakia to the north and Yugoslavia to the south.
P :	Here a great deal of grain is grown.
Q :	In recent years, however, progress has been made also in the field of industrialisation.
R :	Most of this country consists of an extremely fertile plain, through which the river Danube flows.
S :	In addition to grain, the plain produces potatoes, sugar, wine and livestock.
S6:	The new industries derive mainly from agricultural production.
The Proper sequence should be:
QRSP
RPSQ
PRSQ
RQSP
17.
S1:	Palaeobotany is the study of fossil plants preserved in rocks dating back in millions of years.
P :	Records of the history of the world are contained in fossils.
Q :	Through the ages, plants have evolved from simple to more complex forms.
R :	First there were water plants then land plants appeared during the Paleozoic era.
S :	But since the fossil remains appear locked in rock layers, they are closely related to the geologist area of investigation.
S6:	The fossil plants indicate the age of the rock, and also point to facts regarding climate, temperature and topography.
The Proper sequence should be:
RQSP
SQRP
PSQR
QRPS
18.
S1:	On vacation in Tangier, Morocco, my friend and I sat down at a street cafe.
P :	At one point, he bent over with a big smile, showing me, a single gold tooth and a dingy fez.
Q :	soon I felt the presence of someone standing alongside me.
R :	But this one wouldn't budge.
S :	We had been cautioned about beggars and were told to ignore them.
S6:	Finally a man walked over to me and whispered, "Hey buddy this guy is your waiter and he wants your order"
The Proper sequence should be:
SQRP
SQPR
QSRP
QSPR
19.
S1:	And then Gandhi came.
P :	Get off the backs of these peasants and workers, he told us, all you who live by their exploitation.
Q :	He was like a powerful current of fresh air, like a beam of light, like a whirlwind that upset many things.
R :	He spoke their language and constantly dre their attention to their appalling conditions.
S :	He didn't descent from the top, he seemed to emerge from the masses of India.
S6:	Political freedom took new shape and then acquired a new content.
The Proper sequence should be:
QSRP
SRQP
RSQP
PRSQ
20.
S1:	Biological evolution has not fitted man to any specific environment.
P :	It is by no means a biological evolution, but it is a cultural one.
Q :	His imagination, his reason, his emotional subtlety and toughness, makes it possible for him not to accept the environment but to change.
R :	And that series of inventions by which man from age by age has reshaped his environment is a different kind of evolution.
S :	Among the multitude of animals which scamper, burrow swim around us he is in the only one who is not locked in to his environment.
S6:	That brilliant sequence of cultural peaks can most appropriately be termed the ascent of man.
The Proper sequence should be:
QPRS
SRQP
QRSP
SQRP