Thanks to the joint efforts made by the

问题选择题

Thanks to the joint efforts made by the leaders of China and the US over recent years, mutually _______ Sino-US relations have made remarkable progress.

A．adaptable

B．beneficial

C．relevant

D．convenient

答案

答案：B

B 句意：由于近年来中美两国领导人的共同努力，双边互惠的中美关系取得了长足的发展。beneficial意为“有益的”，符合句意。adaptable有适应能力的；relevant相关的；convenient方便的。