The boss asked his secretary_____he had finished typing the report

The boss asked his secretary_____he had finished typing the report

题目
The boss asked his secretary_____he had finished typing the report
A.if;or not B.if;not
Cwhether;or not D.whether;not
在AC间徘徊 求正确答案以及解释-v-
The boss asked his secretary_____he had finished typing the report_____
A.if;or not B.if;not
Cwhether;or not D.whether;not
答案
Cwhether;or not
if不能和or notlianyong
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