单项选择题

Our scientific findings cannot be regarded as ______ in such a short period of time.

[A] to have been obtained
[B] to be obtained
[C] having been obtained
[D] being obtained
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单项选择题
What does the man think of Thatcher
A．She was just lucky.
B．She was exceptional.
C．She was strong-minded.
D．She was a chauvinist.
单项选择题
All of the following are true according to the passage EXCEPT ______.
A．in the wartime trained message pigeons can fly 500 to 600 miles
B．hardships and dangers cannot block pigeon’s instinct to return home
C．racing horses are able to learn much faster than other horses
D．the message paper is carried usually under the wings of the pigeons
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