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Limiting the global temperature rise requires _____ global CO2 emissions.

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Saving _________ species from becoming extinct is crucial for our health and the future of our children.

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They started a campaign to ___________ smoking among teenagers.

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It is high time we had to ________ some measures to protect endangered animals.

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The giant panda's natural ________ is the bamboo forest. Giant pandas like to eat bamboo leaves.

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_________ so much, the doll is still on the shelf.

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_________ at by everyone, he was disappointed.

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When _________ to explain his mistake, the new employee cleared his throat nervously.