Dear Silvia,

I have decided to ____1_____ my parents’ 25th wedding anniversary (结婚纪念日) on December 15, 2024. I made plans for the weekend ____2_____ everyone could take part in it. It’s a surprise, so I’d be happy if you could make it with your family.

We will celebrate their anniversary at our house. It would be a small gathering of close relatives. I am writing to you now because I need your ____3_____ with planning and organization (组织). It would be ____4_____ if you could come home a few days early and help me with everything. Please let me know when you can come.

I look forward to ____5_____ from you.

Yours,

Diana

1.1.

A remember

B celebrate

C plan

D win

解析：选B。B 考查动词。根据题空后的“my parents’ 25th wedding anniversary”可知，戴安娜决定“庆祝”父母的25周年结婚纪念日。故选B。

2.2.

A so that

B as soon as

C even if

D as if

解析：选A。A 考查连接词。根据题空前的“the weekend”和题空后的“everyone could take part in”可知，庆祝活动在周末，“为了”每个人都可以参加。故选A。

3.3.

A time

B money

C help

D family

解析：选C。C 考查名词。根据第二段倒数第二句的“help me with everything”可知，戴安娜在寻求西尔维娅的“帮助”。故选C。

4.4.

A great

B interesting

C boring

D difficult

解析：选A。A 考查形容词。根据题空后的“if you could come home a few days early and help me with everything”如果西尔维娅能提前几天回家帮戴安娜的话，那将太棒了。故选A。

5.5.

A hear

B heard

C hears

D hearing

解析：选D。D 考查固定搭配。“look forward to”后更动词的-ing形式。故选D。