单项选择题

It's amazing that two researchers working independently made the same discovery ______.

A．spontaneously
B．simultaneously
C．collaboratively
D．conscientiously
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单项选择题
I have to say this, but this coat you've just bought is made of ______ fur; it's not real mink.
A．coarse
B．genuine
C．slippery
D．simulated
单项选择题
A ______ refers to an animal that is born from its mother's body, not from an egg, and drinks its mother's milk as a baby.
A．mammoth
B．penguin
C．mosquito
D．mammal
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