1 . Electric cars produce about 80 percent less pollution than those ___________ gas-powered motors. (用适当的的词填空)

2 . All of her runs have a guiding purpose: to call attention ________global water issues.(用适当的词填空)

3 . Nina recently finished her year-long series of runs in Chicago, ________housands were attending a water conference.(用适当的词填空)

4 . Tiger sharks like to live in waters ______ humans usually swim, so the chances of an encounter are much greater. （用适当的词填空）

5 . World Environment Day is a UN Environment-led global event, ______ takes place on June 5 every year and is celebrated by thousands of communities worldwide. （用适当的词填空）

6 . This year, the 13th Spring Festival Joint Exhibition of Chinese Books, ______ theme was “Reading China”, was held on January 24th in 85 bookstores worldwide. （用适当的词填空）

7 . The team now wants to find out________dogs have a similar emotional response when reunited with other dogs.(用适当的词填空)

8 . When________(see) from afar, the mangrove forests appear more splendid.(所给词的适当形式填空)

9 . Up to now, China________(establish) a number of protected areas with mangroves.(所给词的适当形式填空)

10 . Mangroves can help soften waves and protect________(city) from coastal winds.(所给词的适当形式填空)