问题描述：
1.Jim has made many friends since he [came] to china
为什么不是：
Jim has made many friends since he [has came] to china
2.She said she was[ ]{get的适当形式}used to these table manners
为什么不是：
Jim has made many friends since he [has came] to china
2.She said she was[ ]{get的适当形式}used to these table manners
问题解答：
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