1 . Da Vinci is believed ____________ (employ) oil paints already long before this technique reached its height with Rembrandt. (所给词的适当形式填空)

2 . People base their happiness on successful careers and when it doesn’t live up to their ____________(expect), frustration tends to have negative impacts on their mental health. (所给词的适当形式填空)

3 . Ba Jin gained ____________ (recognize) for writing at a very young age, and today he is still acknowledged as one of China’s greatest writers. (所给词的适当形式填空)

4 . The UNESCO World Heritage Center repeatedly urges that some cultural relics in Egypt _________________ (restore) in order to prevent them from collapse. (所给词的适当形式填空)

5 . It was the staff’s resolution and _________________ (persevere) that helped this corporation carry through its goal and succeed eventually. (所给词的适当形式填空)

6 . To avoid getting distracted ______ computer games, students are encouraged to develop different kinds of interests and take more exercise. (用适当的词填空)

7 . Last Sunday, while _____(play) football,he suddenly fell down to the ground, looking in great pain.

8 . Calligraphy (书法) is not only a tool of cultural communication but ________ artistic treasure with shining and extraordinary beauty. (用适当的词填空)

9 . Realizing that I was the only girl who was not invited, I grew increasingly upset and disappointed for being left ________.(用适当的词填空)

10 . The term “stooper” was coined in the US after a lot of people put their used or underused ______ (belong) in front of their doorsteps to be taken away for free by those in need. （所给词的适当形式填空）