1. (2023高三下·浙江月考) 听下面一段独白，回答以下小题。

1. （1） What is the speaker mainly talking about?

   A . A search engine. B . A language program.

   C A free lesson website for teachers.

3. （2） How many people use Duolingo currently?

   A . Over one hundred million. B . A few hundred thousand. C . Several thousand.
5. （3） Where is Luis von Ahn from?

   A . Switzerland. B . Guatemala. C . Costa Rica.
7. （4） How was Duolingo originally funded?

   A . By big websites. B . By an actor. C . By school.