问题补充：
—Yang Liwei has won great honour for our country.
—Who is Yang Liwei?
—What a question! It is surprising that the first spaceman in China.
A. you didn’t know our national hero
B. to you not to know him
C. you should know nothing about
D. you knew nothing about him
答案：
A. you didn’t know our national hero
B. to you not to know him
(答案→)C. you should know nothing about
D. you knew nothing about him
解析：因为在it is surprising后的that从句中，谓语要用“should +动词原形”，其中should含“竟然”之意，不可省略。
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