1 . 阅读下面句子，在方框内选择一个适当的词，在空白处填入其正确的形式，其中有两个多余。

promote       concern        investigate          conduct        issue       harmony recover        symbol        appropriate          shelter          affect     boost

1. Applause is a sign of __________after a good performance.
2. The chairman answered several questions ___________the future of the nation.
3. Red envelopes are a traditional Chinese New Year gift ___________good fortune.
4. After spending a semester together, our class has established a __________relationship.
5. All the people in the country were deeply ________by the death of great scientist.
6. The company has announced that it will carry out a full ____________into the accident.
7. After the war broke out, a neighbor _________the boy whose parents were killed for seven days.
8. A guide ____________the tourist around the ruins of the accent Inca Empire when one tourist discovered something unusual.
9. One admitted into a university in Australia, you will _____________with a student visa valid for 2 years.
10. To be awarded the student of the year has greatly _________my confidence in setting a high goal.