1.She e____ up her speech with a joke.
2.We should estimate the e____ first.
3.Ben,your socks are dirty.You should wash them clean with s___.
4.The daughter said that she wouldn't cheat in the exams a____.
5.The Three Gorges(三峡) P____ is really the greatest of its kind in the world.
6.No one helped them.They did it by t____.
7.What have you done for c____.
这都是我想了几天都没想出来的题.望各位指教,不甚感激...