Bill is good at doing things and dealing with difficult things. He is ____(practice)

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• Bill is good at doing things and dealing with difficulties.He is p()
• 完形填空： Walking home from school one day.Mark noticed a boy ahead of(1)____tripped anddropped some things.Mark came up to himand helped him(2)____them up.Since they were going the same way,he helped to carry some things.(3)____they walked,Mark knew that the boy's name was Bill and that he was getting into some trouble. After(4)____to Bill's home,they began to talk.The afternoon passed(5)____with a few laughs.Soon they became good(6)____.Laterthey ofte
• Bill is good at doing things and dealing with difficult things. He is ____(practice)
• 区别get bring carry take fetch ,for to of .
• 弱碱为什么可以至强碱