单选题
It is
laid down
in the regulations that all members must carry their membership cards at all times.
A、
suggested
B、
warned
C、
stated
D、
described
【正确答案】
C
【答案解析】
[解析] lay down是个短语，除了按其字面意思可以解释为“放下”外，还可以解释为“规定、写下”，本句中用的是它的被动形式It is laid down...
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