从A、B、C、D四个选项中，选出可以填入空白处的最佳选项，并在答题卡上将该项涂黑。
1. Most animals have little connection with ________animals of _________different kind unless they kill them for food.
A．the ; a B．不填 ; a C．the ; the D．不填 ; the
2. The three sisters decided to hold a family party to ________ their parents' silver wedding.
A. celebrate B. memorize C. congratulate D. welcome
3．It was __________ back home after the experiment.
