单项选择题

______, electrons are still smaller.

A．As atoms small are
B．As atoms smaller as
C．Small as atoms are
D．Smaller atoms as are
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单项选择题
Tom looks so pale today. He ______ ill.
A．must be
B．had to be
C．should be
D．shall be
单项选择题
I am not used ______ like that.
A．to being spoken
B．being spoken
C．to speak
D．to speaking
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