PS:请写出为什么1.---- the moring of April 15th,they finished readi

PS:请写出为什么
1.____ the moring of April 15th,they finished reading the book.
A.From B.At C.In D.On
2.They did some cooking last night.（改为否定句）
3.When did she first go to movies?（改为同义句）
_____ ______ was she when the first went to movies?

D
原短语应该是in the morning,但只要morning被修饰,前面的介词就要改为on,比如on Friday evening.
They didn't do any cooking last night.
加助动词构成否定,且some在否定和疑问句中,须改为any.
How old
原意为“她什么时候第一次看的电影?”
根据句意,可知翻译成同义句是“她第一次看电影时多大?”