单项选择题
Our department has a large collection of books,（）are in English.
A．many of which B．many of them C．many ones D．their many
单项选择题 Let's go shopping,（）
单项选择题 —"Excuse me, could you please have my computer（）" —"Of course."
单项选择题 He saved the drowning child（）the cost of his own life.
