The next day they found that the door remained .A.to lockB.lockingC.lockedD.to b
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The next day they found that the door remained ________.
A.to lock
B.locking
C.locked
D.to be locked
试题答案
C
解析：remain是link v．，又因the door是表物的名词作主语，故此处用过去分词locked作表语。