2 . 我尽力想说服他改变主意，但是他坚持认为自己是对的。(persuade)
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3 . 阅读下面短文，在空白处填入适当的内容(一个单词)或括号内单词的正确形式。

When I was a kid, one day I found a little sheepdog on my way home from school. The owner was the grandmother of my friend,     1    told me that they were giving the dog away, and I could have her    2    I wanted her. Well, needless to say, I wanted her! When I brought her home with delight, I     3    (tell) we could not have that dog in the house. My father told me we could take care of her    4    we found another home for her. My father did all he could to avoid     5    (stay) with the dog, giving her no attention. Occasionally, he urged me to find the new owner     6    the dog. One day, when my mother and I came home from the grocery store, my mom stopped me at the front window. My dad was on the floor,     7    (play) with that precious little sheepdog.     8    (instant) he heard us at the door, he quickly jumped up,     9    went about his business, but I will never forget     10    I saw that day! When that dog died, my father even cried! The sheepdog has brought wonderful memories to me and my family.

4 . ______ scientists know where a storm will happen, winds will suddenly change, carrying the storm to a new direction.

A．Even if

B．Since

C．Despite

D．Unless

5 . The conflict had developed into a stage ______ the two countries were gathering big troops on the border.

A．where	B．when
C．which	D．that