单选题 Sir Denis, who is 78, has made it known that much of his collection ______ to the nation.
A. leaves B. has left C. is to leave D. is to be left

【正确答案】 D

【答案解析】[解析] is to be left to the nation打算把……交给国家。“be to+不定式”表示打算或计划做什么。