答案 谢谢

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段段0102
2015-08-09 · TA获得超过7811个赞
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4 saw
5 has gone
6 became, has worked
7 has been taught, saw
8 have been, went
9 have seen
10 has left
11 has not arrived
12 took
13 lost, am looking
14 haven't seen
15 has been
16 has worked
17 has learnt
18 have mended
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