Father made a promise I passed the examination he would buy me a bicycle.
A. that
B. if
C. whether
D. that if
网友回答
A. that
B. if
C. whether
(答案→)D. that if
解析： that引导同位语从句，对promise进一步说明或解释，that引导的同位语从句中，if引导的是条件状语从句。句意是“父亲许下诺言说如果我考试过关，他给我买一辆自行车”。