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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I am used ______ my sleep interrupted.
A．to have
B．having
C．have
D．to having
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It ______ John and Kate who helped me the other day.
A．is
B．was
C．are
D．were
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