1 . 单句填空
1. Attempts to find a______（solve）have failed.
2. This small country has an______（amaze）variety of landforms.
3. ______（found）in 1911，Qinghua University is one of the most famous ones in China.
4. If cancers are spotted early there’s a high chance of ______（survive）.
5. Can you figure out ______ the poet really means in this poem？
6. A library is a place ______ we can borrow books.
7. Is that the reason ______ you didn’t take the exam？
8. Do you know the date ______ Lincoln was bon？

2 . There are many reasons_________people want to engage in voluntourism.(用适当的词填空)