1 . While avoiding __________(fly) is not always practical, we can help improve the environment by travelling on local public transport or even on foot wherever possible. (所给词的适当形式填空)

2 . Knowing that life can exist in these extreme conditions has changed scientific opinions about the chances of there __________ (be) life elsewhere in the universe. (所给词的适当形式填空)

3 . If everything looks promising,then it will justify________(try)to build a sleep lab and study sleep across cultures that way. (所给词的适当形式填空)

4 . The ________ behaviors between the two sides suggest that they both realize the importance of ________ with others and in turn it helps to strengthen the ________ between them. (cooperate) (所给词的适当形式填空)

5 . The main structure of the chariot has likely rotted (腐烂) away after __________ (spend) more than 2,000 years in the ground but researchers did find a row of six sheep skeletons (骨架) wearing attachments used for pulling a chariot, so they __________ (infer) this was a sheep-drawn chariot. (所给词的适当形式填空)

6 . It’s designed to be included into existing seating systems, without ________ (require) any major structural changes. The design team hopes to eventually see the convertible chairs installed on every plane. (所给词的适当形式填空)

7 . After opening as a commercial port, Shanghai is proud of ________ (have) the first mechanized (机械化的) production line for chopsticks, which are not only supplied to Zhongnanhai and Diaoyutai State Guesthouse but also presented to foreign friends as gifts. (所给词的适当形式填空)

8 . “Donation of these items is more than an exchange of cultural heritage across the Strait. Cultural communication has always played a crucial role in _________ (strengthen) our links.” (所给词的适当形式填空)

9 . Her proposal was met with an enthusiastic ______. By______ quickly to changes in the markets, farmers can earn enough profits. (respond) (所给词的适当形式填空)

10 . There seems to be some _______over who is actually giving the talk. Stop _______me with other facts! I feel completely _______with these _______ figures. (confuse) (所给词的适当形式填空)