单项选择题

What were Helen's feelings about the move from London to Stretton

A．She wanted to remain in the country.
B．She had been unwilling to leave London.
C．She thought it was time to return to London.
D．She would have preferred a weekend house in the country.

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单项选择题

What do both theories assume to be true

A．That new material is continually being formed.
B．That, in time, the universe will contract.
C．That the universe is expanding at present.
D．That" a big bang" started the expansion.

单项选择题

According to Lemaitre , the separate galaxies formed

A．during a pause in the expansion of the universe.
B．at the time of the primeval explosion.
C．and will continue to form for ever.
D．about 20, 000 million years ago.