下列各组字母中全部是元音字母的是 ____。A. a, e, o, r B. a, i, u, e C. o, u, e, n
---Sit down, please.---_____.
How many _____ can you see in the picture?
The shoes _____ under the bed in her room.
I like _____ the piano and I can _____ a bike.
This is my friend. _____ name is John.