The line was bad .We couldn’t______each other clearly.

The line was bad .We couldn't______each other clearly.
a.hear b.listen to c.sound d.speak to
应该选哪一个啊?

hear
1.听见;听
I heard him say so.
我听到他这么说过.
I can hear someone knocking.
我听到有人敲门.
listen
1.听,留神听
She's listening to the radio.
她在听广播.
sound
1．听起来,听上去
It sounds nice
听起来美妙
speak to
1.提及
We haven't much time,please speak to the subject.
我们时间不多,请不要离开话题.
所以选择A（因为楼上的翻译很好,我就不翻译了,通过字的意思和语感是可以做出的,如果不知道意思,多读也是一种方法,而且这种方法很适合在考试中,试试看吧）