题目内容
用恰当的介词、副词填空
I ran ________ my old friend Tom in Paris last year．
You can rely ________ me to keep your secret．
I offered the alternative suggestions ________ spending the vacation in the mountain or by the sea．
用恰当的介词或副词填空
The world we live in is filled ________ mysteries．
No evidence ________ life has been discovered on any of the planets so ________．
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