英语单句改错，在线等！20分，会追加！

来源：百度知道 编辑：UC知道 时间：2024/06/28 03:27:17
1.it is not easy for us study a foreign language well . 2.though he is a young teacher ,but he achieve a great deal in teaching .3.china is a developed country in the world .4.i often hear the song singing .5.they were satisfying with out work .

1.it is not easy for us(to) study a foreign language well .
2.though he is a young teacher ,he achieve a great deal in teaching .
去掉though或but
3.china is a (developing) country in the world .
4.i often hear the song (sung) .
5.they were (satisfied )with out work .