No one can explain why it is the way it is．It a mystery． [ ] A．keeps on B．looks
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No one can explain why it is the way it is．It ________ a mystery．
[]A．keeps on
B．looks
C．remains
D．leaves
试题答案
答案：C
No one can explain why it is the way it is．It ________ a mystery．
[]A．keeps on
B．looks
C．remains
D．leaves
答案：C