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He never smokes ________ drinks．
or
because
but
so
Tony was seriously ill, ____ he did't go to hospital.
A．so
B．because
C．but
D．though
Tom likes pandas ________ they are cute．
A．so B．but C．because D．and
I like math, ________ it's interesting.
[ ]
He couldn't come here ________ his illness．
because of