1 . 根据句意，选择单词或短语并以其适当形式填空。

attract to   make a good impression   concentrate on   leave......alone   look forward to be curious about       prefer......to......   graduate from   sign up for   addicted to

1. It is not unusual for teenagers of your generation to ________ computer games and the online world.
2. The guy next to Han Jing tried to talk to her the whole time, which made Han Jing couldn’t ________ the experiment.
3. Try and smile. The key to ________on others is to show that you are friendly.
4. Mike hoped his little niece could ________ while he was trying to finish his homework.
5. Tom wants to improve his oral English by talking with the native speakers. So, he is ________ meeting the new exchange student.
6. Children like exploring the world. They ________ everything around them.
7. I ________ staying at home ________ going outside during the vacation.
8. Some students even become________ the internet and cannot focus on school and family life.
9. After Adam considered his interests and the teacher’s advice, he ________ many suitable courses.
10. After ________ the university, Professor Yuan devoted himself to cultivating the hybrid rice.