题目内容
单句改错
He has come back for three days．
He has made so great progress in English that his English teacher praised him for it. ________________
He has been to many countries, for example, America, Germany, and Japan.
He has learnt enough German to carry out a conversation．
Correction(单句改错)
He has served the army for five years．
He has devoted all his life to protect the rare animal, South China tiger．
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