1 . Nowadays, many kids spend hours c________ online to their friends. But in fact, they should often meet friends and talk to them face to face. (根据首字母单词拼写)

2 . Scientists in the 15-16^th century studied the universe by o__________ (观察) the stars, which is so amazing because some of them can calculate so accurately. (根据中英文提示单词拼写)

3 . Some tourists like ________ (雕刻) their names on the buildings in scenic spots, which is a bad behavior in my opinion. （根据汉语提示拼写单词）

4 . The idea of ________ extinct life forms still belongs to science fiction. (to make an exact copy of a plant or animal by taking a cell from it and developing it artificially) （根据英文提示单词拼写）

5 . We will know more about our history by __________cultural understanding.(根据句意填空)

6 . Taizhou, he always had the peoples best interest at heart, and so he ________(提议) building a sea wall to protect homes from flooding. (根据汉语提示单词拼写)

7 . Beyond this, you can keep healthy by c________ different categories of fresh foods, especially fruit and vegetables, which are full of vitamins and fibre, rather than processed foods. (根据首字母单词拼写)

8 . On August 4, Sina Weibo held a meeting about m ________ (保持)a “rational (理智的)fan community on Weibo”, talking about the need to resist improper behavior on social media. (根据中英文提示填空)