() 2. 1 think Aeveryone should do Btheir part Cto keeping our school clean.

下列各題中均有一處錯誤，找出并改正.

() 1. Our teacher Ataught us Bsing English songs Cyesterday.

12. Betty practiced playing the piano yesterday afternoon.

(用 at five yesterday afternoon 替換 yesterday aflemoon 改寫句子) 

Betty the piano at five yesterday afternoon.

11. They were having dinner when it began to snow.(改為同義句) 

While they ，it began to snow.

10. I was practicing dancing at ten last night.(對劃線部分提問) 。

 at ten last night?

9. Tom should press the sides of his nose.(對劃線部分提問) 

 should Tom?

8. Mr. Brown advised me to get an X-ray.(對劃線部分提問) 

  Mr. Brown advise you?

7. Jenny has a sore throat. (對劃線部分提問) 

 Jenny?

6. 1 was sleeping at the time of the rainstorm.(改為否定句)

I at the time of the rainstorm.

5. 1 gave away some books to a children's home last year. (改為否定句)

I books to a children's home last year.