1.()achievesuccessiseasiersaidthandone,persistencedoesinfactpayoff.这里该填as还是while
2.amud-rockflowhitzhouqu,()about2000deaths.用causing还是havingcaused?
3.puton和putforward有哪些意思?要全点。puton/forwardaperformance该哪个哦
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