根据句意用适当的介词或副词填空。
1. If you can't pronounce the words, please look them _______ in the dictionary.
2. We tried to cheer her up _______ telling her funny stories.
3. When the sun began to go down, he started to put _______ a tent.
4. Thank you _______ lending me your bike.
5. The ideas that he came up _______ worked out fine.
6. Mr Smith set _______ a club to provide books for those who like reading.
7. We will clean _______ the park this Sunday.
8. Extra paper will be handed _______ to students at once.
9. I feel sick. I'll have to put _______ my visit till next month.
10. I told rny teacher _______ my problem.
）分子中的四个原子是共平面的，下列分子中所有原子不可能同时存在同一平面上的是（ ）