读句子并配对连线。
① Where does she live? ____ A. It's on December 25th．
② How's the weather in December? ____ B. I ride a bike in the park．
③ What do you do at weekends? ____ C. It's cold and dry．
④ When is the Christmas Day? ____ D. She lives in Beijing．
⑤ Who is he?____ E. He's Father Christmas．
,则M的子集个数为（ ）
