3. ______, I can spare no time for it now. I’ll have to finish my homework first.

A．However exciting the football is

B．No matter exciting the football is

C．However the football is exciting

D．No matter how the football is exciting

国际通行规则的适用情况是( )

A．选择性适用

B．非限制性适用

C．强制性适用

D．有条件适用