第三节 完形填空（共20小题；每小题1.5分，满分30分）
阅读下面短文，从短文后各题的四个选项中选出最佳选项。
I can honestly say it was the best of times and the worst of times. I was joyfully 21 my first child at the same time that my once – energetic mother was 22 her battle with brain cancer.
For ten years, my courageous mother had fought, but none of the operations or other 23
had been successful.
