Jack who claimed everything clearly however he told a lie.A. to have heardB. to hearC.

问题补充：

Jack, who claimed everything clearly, however, he told a lie.

A. to have heard

B. to hear

C. having heard

D. hearing

答案：

(答案→)A. to have heard

B. to hear

C. having heard

D. hearing

解析：考查不定式的完成式：句意：宣称清楚的听见一切的杰克却撒谎了。Claim后面接不定式做宾语，因为在宣称之前，他已经听见了，用不定式的完成式表示先于句子的谓语发生，选A。