问题补充:
I think it is for them to find the lost bag with the help of the police.
A. proper
B. direct
C. excellent
D. possible
答案:
A. proper
B. direct
C. excellent
(答案→)D. possible
解析:此题考查固定句型结构it is+形容词+for sb to do sth表示对某人来说做某事怎样,根据语境可知选择possible表示可能。