单句改错。

在错的词下划一横线，在该行右边横线上写出改正后的词(每句均有一个错误)。

1. What the earth travels around the sun is known to us all.                           1. ______

2. The ruler that he bought yesterday was lain on the table.                           2._______

3. He returned in the afternoon of his birthday.                                            3. _______

4. He spoke too rapidly that we couldn't clearly understand him.                   4. _______

5. He shouldn't have gone abroad, for I saw him in the part this morning.      5. _______