告诉我其他选项的错误之处就好了,

1. whosever 是关系代词型连接,相当于“先行词 + 关系代词 whose”,在本句中既是介词 to 的宾语,又是name 的定语. 因此,Remember to return it to (whosever) name is on it 可以改写为——
Remember to return it to (the man whose) name is on it.（不要忘记把它归还给上面写着名字的那个人【他的名字在上面的那个人】）

另如：
* You may vote (whosever) side you like. 你可以投票选你喜欢的任一方.
【= You may vote (anyone whose) side you like】）

除此之外,what,whatever,whoever都可以用作关系代词型连接词.例如：

* I don’t understand what you were saying just now.
【= I don’t understand (everything that) you were saying just now.】
* Whatever is left over is yours. 剩下来的所有的都是你的.
【= (Everything that) is left over is yours.】

2. ---When did it begin to snow?
----It started ______ the night.

A. during the night表示“在天黑期间”
B. by the night 表示“到将来或过去的某个夜间为止”,因此只用于将来完成时或过去完成时,如It will have started by the night（将在天黑以前开始）或 It had started by the night（在天黑以前已经开始）
C. from the night 表示从“黑夜开始下雪”,但是 start 是瞬间动词,不能持续发生.
D. 在晚上只能说at night,不能加定冠词说成by the night.

3. 原题有错,应该把expert改为expect

1）expect 以及 think,believe,suppose,imagine 几个动词,如果要否定它们后面的宾语从句,否定词必须转移到主句的这类动词前,因此“I didn't expect that …” 意思是“我原来认为不是那样”,而不是“我原来不认为是那样”.
2）it was as wonderful是同级比较as wonderful as I had expected about it 的省略；即“我原以为它没有（像我期待的）那样精彩”,言外之意是“事实上很精彩”.