.the meeting should last two days or three days doesn’t matter.A. ThatB. WhetherC. IfD. Wh

问题补充：

.the meeting should last two days or three days doesn’t matter.

A. That

B. Whether

C. If

D. Where

答案：

A. That

(答案→)B. Whether

C. If

D. Where

解析：考查主语从句。句意：是否会议持续两天还是三天没关系。If意为是否不能引导主语从句，要使用Whether。