Нужно сделать косвенную речь

(11) My friend asked me, if I had finished reading the book.(12) My mother asked me what's the matter about why I am looking pale.(13) Sister were looking everywhere for Robbie.(14) David is going to wear a pullover, because it's too cold.(15) Mother said to Alice not to interrupt the grown-ups.(16) The chairman said to begin the meeting.(17) The doctor said to eat more fruits and vegetables.(18) She told us to shut the door but don't lock it.(19) He asked me to speak more slowly because he couldn't understand me.

Объяснение:

Косвенная речь — синтаксический введения в свою речь чужой речи с сохранением основного содержания высказывания, представленной как пояснительная придаточная часть сложноподчинённого предложения и находящейся в формальной зависимости от фразы передающего её лица.