The policeman came up to the lonely house with the door ______ ,_____ there for a while and then entered it.
A.open; to stand
B.opening; stood
C.open; stood
D.opened; standing
网友回答
C解析考查open的词性和stand的非谓语形式和谓语形式的区别。。Open就是形容词，故不需要B
D.第二空，stood和前面的came up和后面的entered 并列关系，所以用过去时，作谓语。