单项选择题A.The doctors didn’t know hearts could take surgery.B.The doctors didn’t have the right cutting tools for the surgery.C.The doctors didn’t know what was happening in the patient’s chest.D.The doctors were so afraid that they dare not take the chance.
单项选择题A.The books were too expensive to buy.B.He bought a lot of books over there.C.There were many people at the book sale.D.There were a good variety of books.