请大佬解释一下为什么填is to be left.😭句子意思也不清楚
Sir, Dennis, 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
语法学得太烂了
Sir, Dennis, 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
语法学得太烂了
