1 . As a foreign student, Tom found __________difficult to write in Chinese. (用适当的词填空)

2 . I find ______ necessary to look after our parents when they get old.(用适当的词填空)

3 . ________ will be quite difficult to get used to all the homework. Still, I’m happy to be here. （用适当的词填空）

4 . ________ is known to all that the earth goes around the sun. （用适当的词填空）

5 . They want to make ________ clear to the volunteers that the cleaners are responsible for the cleaning work. （用适当的词填空）

6 . The injury in her leg makes ________ impossible for her to return to track and field. （用适当的词填空）

7 . ________ is very important to show respect for our traditional festivals and pass them down. (用适当的词填空)

8 . I can understand why astronauts find ________ difficult to readjust to life on earth. (用适当的词填空)

9 . ________ occurs to me that I might use my pocket money to buy some flowers for my mother on Mother’s Day. (用适当的词填空)

10 . She makes ________ a rule to rise early every morning, take a hot bath and go out for a walk. (用适当的词填空)