问题
单项选择题
The professor said he could talk on （）interested the audience．
A.any topic
B.which topic
C.whichever topic
D.the topic he thought it
答案
参考答案：C
解析：whichever已失去疑问含义，等于 anything that，表示强调； 而 which topic中 which保留疑问含义，译成"哪一个题目"，不符合句义。而A和D中缺少连词。