The twins are singing in the room now.改为同义句The twins are singing in the room ( )
问题描述：
The twins are singing in the room now.改为同义句The twins are singing in the room ( )
His sister is fifteen years old .I am tweleve years old.改为同义句I"am ( )than his sister.
Alex spends two hours playing sports every day.改为同义句（ ）Alex two hours ( ) play sports every day.
Exercising every day is very important for students.改为同义句（ ）is very important for students ( ）every day.
答
The twins are singing in the room (at present).I'm (three years younger)than his sister.（It takes）Alex two hours (to) play sports every day. （It ）is very important for students (to exercise）every...