根据首字母提示或汉语意思填空，使短文意思通顺，结构完整。
When I was young, I studied hard all the time. But (1)u_________,my grades were low and I nearly lost (2) (信心) _________in myself .
My father was worried about it .He took me to the garden .Pointing to two rows of trees ,he asked me ,"Do you know what trees they are ?" I watched (3)c_________ and answered, "They are poplars and gingkoes. " My father asked me to (4)c_________ poplars with gingkoes and find out the (5)(不同) _________ between them .It’s very clear that poplars are much (6)t_________ than the gingkoes.
My father told me the two rows of trees (7)（种）_________ at the same time . While being planted , they were as tall as each other .With the same sunlight ,the same water and the same care, but why are the poplars so tall and the gingkoes are so (8)s_________?
I stood there without (9)s_________ a word . Then my father said ,"Boy ,you know ,the valuable things often grow up slowly."
I knew what my father meant by saying so .From then on, I studied harder and harder .And my grades (10)i_________ greatly .Three years later ,I succeeded in entering Beijing University .