In1990．whenI（50）（be）nineyearsold．Iwantedverymuchtofind（51）penfriend．IfoundAshley'saddressinamagazine，anddecided（52）（write）toher．Isentoffmyletterwithalittlehope．Veryquickly．

Question

In 1990．when I （50）___ （be） nine years old．I wanted very much to find （51）___ pen friend．I found Ashley's address in a magazine，and decided （52）___ （write） to her．
I sent off my letter with a little hope．Very quickly．I received her letter．（53）___my surprise．Ashley was only one month （54）___ （old） than me．I learned some new expressions from her.1 （55）___ （real） liked this new friend．
Letter after letter，year after year，Ashley and I continued to write to one another．A letter would be received and I'd write back right away．We would send each other birthday and Christmas （56）___ （gift）．
Eight years later，my parents decided it was time （57）___ me to meet this friend．They drove me down to Mississippi for a few days．We （58）___ （have） a fun time together．We did the things that teenage girls love to do．
Twenty-five years after the （59）___ （one） letter．Ashley and I still have an amazing friendship．Although we don't write letters now．we communicate through mobile phones and the Internet．

Answer 1

50：was  考查be动词的时态  根据"In 1990"可知，这句话的时态为一般过去时．又因主语是"I"，所以此处应用am的过去式，故答案为was
51：a   考查冠词   根据名词"pen friend"为可数名词单数形式可知，此处应用不定冠词修饰．又因pen是以辅音音素开头的单词，故此处答案为a
52：to write  考查动词形式  根据动词"decided"可知，此处考查的是动词短语"decide to do sth 决定做…"，所以此处应该用动词的不定式，答案为to write
53：To  考查介词  根据现有词语"_ my surprise"可知，此处考查短语"to one's surprise  令某人惊讶的是…"，所以此处应用介词to，因to位于句首，所以首字母应该大写，答案为To
54：older  考查形容词的比较级  根据"than me"可知，此处应该用形容词的比较级形式．old的比较级为older，故答案为older
55：really  考查副词  根据"liked"可知，应填词语修饰动词，所以此处应填词语为副词，real的副词形式为really，故答案为really
56：gifts  考查名词  根据"birthday and Christmas"可知，礼物不止一份，所以此处应该用gift的复数形式，答案为gifts
57：for  考查介词  根据现有句子可知，这里考查的是句型：It is…for sb to do sth，for在这里意为"对…来说"，故答案为for
58：had  考查动词形式  根据上句"They drove me down to Mississippi for a few days"可知，事情发生在过去，所以此处应该用have的过去式，答案为had
59：first  考查序数词  根据句意"从_信开始已经过去25年了"及提示词可知，此处意为"第一"，所以这里应该用one的序数词形式，答案为first