A
Our cat was ready to give birth to her kittens. My son was curious and excited to see the birth of these new babies. The event took place yesterday. The cat ___1___(give) birth to one kitten by the time he arrived home from school. He was so amazed at ___2___ he saw. When the second was on its way, the mother cat began to yell very loudly. I saw tears in my son’s eyes because he learned about the pain of giving birth.
【答案】1. had given
2. what
【解析】
【分析】
这是一篇记叙文。文章主要讲儿子看猫妈妈生小猫的事。
【1题详解】
考查时态。根据短语“by the time he arrived home from school”可知，此处应该用过去完成时，give的过去完成时形式是had given。故填had given。
【2题详解】
考查连接代词。分析句子可知，此处是一个宾语从句，需要填连词；saw缺少宾语，且根据文意看见的应该是猫生宝宝的事情，故用指物的连词what。故填what。
【点睛】by the time引导时间状语从句时，它对应的主句一般用完成时形式，例如第1小题：
The cat ________(give) birth to one kitten by the time he arrived home from school.
时间状语从句by the time he arrived home from school是一般过去时，故主句用过去完成时，give
过去完成时形式是had given，故填had given。
