He listened but could hear nothing.

He listened but could hear nothing. I listened but----------(hear) nothing. He listened carefully but he could not hear his teacher clea He listened carefully ,but he could ( ) nothing A sound B fe she could hear(),but he could not see() A nothing,anything B we — ,but— nothing A listened;heard B listened;listened C he we listen but could hear nothing.could可以去掉吗 I listened but()(hear) nothing.用动词的正确形式填空 找错i heard but i listened nothing 改错I listened carefully,but nothing heard. We-----but could------nothing. He could do nothing but 后面跟原型还是不定式