如图，O是Rt△ABC的角平分线的交点，OD∥AC，AC=5，BC=12，OD等于（　　）

⑴I'm hungry.____                       A. She's running.

⑵What are you doing?____       B. He's making noodles.

⑶What are they doing?____      C. I'm hungry, too.

⑷What is she doing?____          D. They are rowing a boat.

⑸What is Sam doing?____         E. I'm reading a book.

拼拼，读读，写写。