1 . The professor entered the hall, ________ (follow) by a group of students. (所给词的适当形式填空)

2 . Do you want to pick up the ticket by yourself or have it d________________to you? (根据首字母单词拼写)

3 . People read newspapers and magazines to keep themselves ________ (inform) of what is going on in the world outside. (所给词的适当形式填空)

4 . It is your duty to keep your boss _________(inform)of the situation here. (所给词的适当形式填空)

5 . The movie was s________(拍摄) in late 1990 in New Zealand. (根据中英文提示单词拼写)

6 . Stand with your knees slightly ________.（弯曲）（根据汉语提示单词拼写）

7 . The painting is e________ to be worth over 1 million dollars. （根据首字母单词拼写）

8 . It is ______ (估计) that 25% of all methane that released into the atmosphere came from farm animals.（根据汉语提示单词拼写）

9 . The problem ________ (refer) to in his speech has raised public concern.（所给词的适当形式填空）