听材料,回答问题。
(1)
What is the speaker mainly talking about?
A . A search engine.
B . A language program.
C . An online dictionary.
(2)
How many people use Duolingo currently?
A . Over one hundred million.
B . A few hundred thousand.
C . Several thousand.
(3)
Where is Luis von Ahn from?
A . Switzerland.
B . Guatemala.
C . Costa Rica.
(4)
How was Duolingo originally funded?
A . By big websites.
B . By an actor.
C . By school.
答案: B
A
B
A