( ) 1. Betty is ______ years old.
A. 10
B. 11
C. 12

( ) 2. Sandy is ______.
A. thin
B. quiet
C. tall

( ) 3. Betty often ______ with Sandy after school.
A. plays basketball
B. sings
C. dances

( ) 4. Lily may come back ______.
A. on the weekend
B. in the winter holiday
C. after school

( ) 5. They can ______ together.
A. sing
B. read books
C. dance

B、C、A、B、C

1. 根据短文中的“She is eleven years old, the same age as me.”可知Betty和Sandy同岁，Sandy是11岁，所以Betty也是11岁，答案选B。
2. 文中提到“She is tall.”，明确表示Sandy是高的，A选项thin（瘦的）和B选项quiet（安静的）文中未提及，所以选C。
3. 从“I often play basketball with her after school.”可知Betty放学后经常和Sandy打篮球，B选项sings（唱歌）和C选项dances（跳舞）不符合文意，答案选A。
4. 由“If you come back in the winter holiday, we can dance together.”可知Lily可能在寒假回来，A选项on the weekend（在周末）、C选项after school（放学后）不符合文意，答案选B。
5. 根据“If you come back in the winter holiday, we can dance together.”可知她们可以一起跳舞，A选项sing（唱歌）、B选项read books（读书）文中未提及，答案选C。