Scientists studying the morphology of the human race (a) ………………………. (be) of the opinion that throughout the 200,000 years of the history of modem humans, we (b) ………………………. (be) the shortest, lightest and, the least robust. Even our brains are the smallest. Two hypotheses (c) ………………………. (has) been put forward to explain the reasons behind these reductions in size. The first one (d) ………………………. (be) that the nutritional stress after the start of the agricultural era some 10,000 years ago led to a reduction in the size of humans. Mr. Maciej Henneberg of the University of Johannesburg (e) ………………………. (relate) the body size to the position of the earth in its orbit. He (f) ………………………. (say) that individuals born between February and July end up shorter and lighter than those born during the rest of the year.
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a) are
b) is have
c) have been
d) is they
e) are
f)Sayed
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Answer:
a) are
b) is have
c) have been
d) is they
e) are
f)Said
Explanation:
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