Sir Denis, who is 78, has made it known that much of his collect

Sir Denis, who is 78, has made it known that much of his collection ______ to the nation.
A、has left
B、is to leave
C、leaves
D、is to be left
【正确答案】：D
【题目解析】：收藏品应该是被留给国家，所以要用被动语态，be+done,因此可排除选项A，B和C。