A. they can be produced easily on the Earth

B. there are a lot of them on Venus

C. they can be easily carried to Venus

D. they can live in hot and cold conditions and produce oxygen 4.

The first citizens will find life on Venus not pleasant because ___________.

A. their hearts will suffer more stress

B. their days and nights will last quite long

C. there are not any houses there

D. there is too much water there 5.

One of the advantages the first citizens on Venus will enjoy is ___________.

A. they will have much more space

B. they won't suffer from heart disease

C. their life will last longer

D. they will have better living conditions

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