选择器官移植受者的首位标准是()
A.受者在家庭中的地位
B.受者过去的成就
C.受者未来可能的贡献
D.移植的禁忌证与适应证
E.受者的经济承受能力
参考答案:D
They keep horses and cattle, the former for riding, ______ for food.
A.the latter
B.later
C.latter
D.the later
There is such a problem _____ we all should _____.
A.as; pay attention to it
B.that; attract our attention
C.as; pay attention to
D.that; attract our attention to it