What _____ for dinner? （    ）

阅读下面材料，在空白处填入适当的内容（不多于3个单词）或括号内单词的正确形式。

Jane Goodall has studied chimps for many years and helped people understand how much they behave like humans. She once spent years ____(observe) and recording chimps’ daily activities in their own environment. ____ she first arrived in Gombe in 1960, it was ____(usual) for a woman to live in the forest. Only after her mother came to help her for the first few months ____(be) she allowed to begin her project. One  ____ (importance) thing she discovered was that chimps hunt and eat meat. She also discovered how chimps communicate ____each other.

For forty years Jane Goodall has been outspoken about ____ (make) the rest of the world understand and respect the life of these ____(animal). She is leading____busy life and has achieved what she wanted to do. She inspires those women who want to make ____(achieve) in their lives.

在三个容积均为1L密闭容器中以不同的氢碳比n（H₂）/n（CO₂）充入H₂和CO₂，在一定条件发生反应：2CO₂（g）+6H₂ （g）⇌C₂H₄（g）+4H₂O（g）△H．CO₂的平衡转化率与温度的关系如图所示．下列说法正确的是（　　）

There ______ two bottles of glue on the table.