令人惊讶的是，一些科学发现是偶然发现的．
Surprisingly， some scientific discoveries were made ．
The （careful） you work, the fewer mistakes you'll make．
Chinese parents try their best （提供）a good environment for their children．
A Chinese father made some nice dresses for his daughter with his （wife） old shirts．
No matter what happens, believe in （you）, boys and girls．
A hen on my farm （lay） a green egg yesterday．