再问个英语的问题.producers and exporters know that foreign markets w
再问个英语的问题.
producers and exporters know that foreign markets will _______ to them
A remain opening
B remain opened
C remain opend
D remain openness
答案是C,解析说remain做系动词接open形容词,但是我觉得A也行啊,remain做系动词接doing,哪错了?