单句改错 (每个句子只有一处错误,每处错误只改动一个词。) 1. It was last week we sold our car to a Mexican. ______ 2. Who was it first thought of such a crazy idea? ______ 3. All of us persuaded him to go by air, but he wouldn't listen. ______ 4. We managed to get the work done on time, but failed. ______ 5. They insisted that all the work was finished as soon as possible. ______ 6. Lily was seen go to the supermarket this morning. ______ 7. There is only one copy of it left in the bookstore; go and buy one quickly. ______ 8. His sister has one serious shortcoming. She must be really stubborn sometimes. ______ 9. Going down the hills was a great fun especially as it gradually became warmer. ______ 10. Along the way children dressing in long wool coats stopped to look at us. ______