1．2011•江苏高考it was never clear ________ the man hadn"t reported the accident sooner.
a. that b. how c. when d. why
解析：句意：这名男子没有早点报告这次事故的原因根本没有搞清楚。it在句中是形式主语，真正的主语是why引导的主语从句。答案：d
2．2011•北京高考________ barbara jones offers to her fans is honesty and happiness.
a. which b. what c. that d. whom
解析：句意：“巴巴拉•琼斯给予她粉丝的是诚实和快乐。”“________barbara jones offers to her fans”在句中作主语，为主语从句。what引导主语从句并且在从句中作offers的宾语，故选b项。which表示“哪一个”；whom表示“谁”。均不符合句意。答案：b
