根据下列句子及所给单词的首字母，写出各单词的完全形式。 1. I'm w______ that I'll fail the exam. 2. Only then will I have a chance to a______ my dream. 3. All the students must c______ their attention on their work. 4. He worked as a v______ during the Olympic Games. 5. Mr Kennard is a teacher of much e______. He has taught in several countries. 6. —What's the result? —My mother will make the ______ (决定). 7. If you work hard, you can ______ (通过) the test. 8. Students need ______(严格的) rules. 9. At ______ (目前) they're too short. 10. But they are always talking about what will happen if I don't ______ (成功).