已知{a_n}为等比数列，且a₁₀=30，a₂₀=50，求通项a_n．

根据下列句子中所给汉语意思，写出空缺处各单词的正确形式。(每空限填一个词)

1. Can you ______ (拼写) your name, please?

2. Singing is a good way to make people ______ (害羞).

3. ______ (夏季) comes after spring.

4. Does it take you two ______ (小时) to do your homework every day?

5. Please remember to ______ off (关) the lights.

6. Hurry up, or you will be ______ (迟到) for class.