45. I'm sure it wasn’t Mr. Pike you saw because he is in London.
A. It couldn't be Mr. Pike you saw because lie is in London.
B. It can't have been Mr. Pike you saw because he is in London.
C. It mustn't have been Mr. Pike you saw because lie is in London.
D. It mightn’t be Mr. Pike you saw because he is in London.
Choose the item among A, B, C or D that best answers the question about the passage:
Some day people will certainly try to build settlements oil the moon. The best place for houses in
a moon town will be a cave or a tunnel. Underground house will not be squashed by meteorites
that constantly foil oil the moon from outer space. This will be important on the moon, since
daytime is so hot that food could be cooked in the rocks, and the nights get bitterly cold.
Pioneer moon homes may be made of airtight plastic that call be blown up like balloon inside a
cave. The reasons is that the moon has no air around it. The pioneers will have take along from
the earth the oxygen masks when they arc away from home. But the balloon house itself will be
filled with air. Perhaps the house will have beds, tables and chairs, built into it. These can be
inflated, too So people will sleep, eat, and work on air! Moon-house building will be easy The
moon's gravity is less than the earth's. Everything weighs only one sixth as much as it does on the
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