In today’s increasingly petitive world, that is of great importance to keep a positive attitude towards life. It is important because it could help us solve various problems in life. Taking English learning for example. In our efforts to grasp English, mistakes are unavoidable. In the way, mistakes are annoyed, but a positive attitude can make us realize that only making mistakes can we be expected to make progresses.
As we can see it, keeping a good attitude can help us to deal with mistakes correct and find confidence in time of sorrow. However, its importance cannot be denied.that → it
网友回答
(答案→)that → it
解析：
【小题1】to keep a positive attitude towards life是句子的真正主语位于句末，故用形式主语it。
【小题2】根据It is important ，故用一般现在时，所以could →can 。
【小题3】祈使句，故用动词原形。
【小题4】 in a way是固定用法，意思是在某种程度上。
【小题5】主语mistakes是物，故用annoying。
【小题6】这里想说“只有通过犯错误，我们才能期待取得进步”，所以only后加by。
【小题7】make progress是固定用法，意思是取得进步。
【小题8】as we can see是固定用法，意思是我们可以看到，所以去掉it。
【小题9】来修饰动词短语deal with，故用副词形式。
【小题10】这里表示“因此”，所以however→Therefore。