He asked me , but I didn't know ___. A. how to tell B. what to speak C. to say what D. what to say应选 D 解析：
选D。A选项欠了个宾语，C选项不能这么表达，D选项会比B选项好，所以就选D。
D..what to say他问我，但是我不知道说什么。
