1 . ________ (replace) meat actually, researchers need to increase the rice's protein content significantly. (所给词的适当形式填空)

2 . The only way  ________ (keep) him calm was by singing. (所给词的适当形式填空)

3 . Earthen houses are made of earth, stone, bamboo and wood, all readily available materials which are used ________ (form) walls up to 6 feet thick. (所给词的适当形式填空)

4 . Learning Chinese helps them see life from a new perspective and _________ (broad) their minds to the outside world. (所给词的适当形式填空)

5 . Now, when speaking to Americans, who have a preference ______ the direct style, I found that I often failed _________ (get) straight to the point. (所给词的适当形式填空)

6 . Farmers are deeply disturbed ________ (hear) the bad news. (所给词的适当形式填空)

7 . For years Hainan has been developing its tourism industry, which aims ________ (turn) the island into an international tourist destination. (所给词的适当形式填空)

8 . ________ (strengthen) the connection with young people, the event included a number of public promotional activities on social media, ________ (invite) twenty­nine tea professionals from around the world to have thirty­six hours of uninterrupted live broadcasts. (所给词的适当形式填空)

9 . There is no consensus on ________ to do about “the large language models that are trained on copyrighted works.” (用适当的词填空)