I am good at science， so I dream of becoming a s one day．
我国已和一百多个国家建立了外交关系．
Our country has established diplomatic relations with 100 countries．
除非我们仔细点，否则我们不能把工作做好．
we are careful， we can't do our work ．
改过不嫌晚．
It's never late mend．
This volleyball must belong to Carla．（改为否定句）
This volleyball Carla's．
At first， he didn't know what he could do in the new group．（改为简单句）
At first， he didn't know do in the new group．