Choose the correct alternative.

Sure, there _______ plenty of reasons to _______ terrified about the future of the planet: melting ice sheets, intensifying heat waves, vanishing rainforests, falling temperatures records, dying elephants, bleached out coral and kids in China don’t know the sky is blue. This stuff _______ serious. It's real. It's bad. But it's not the full Picture. In celebration of Earth Day, a day on _______ more than 155 countries _______signing a landmark U.N. agreement on climate change, here are five reasons Earth is not as doomed as you think.

http://edition.cnn.com/2016/04/21/opinions/sutter-earth-day-hope/index.html