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【判断题】
全国产品与服务统一标识代码（NPC）是我国提出的另一种产品与服务编码规则，主要是想用于一些特定行业对产品种类的标识，并制定了NPC国家标准。A.
正确
B.
错误
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举一反三
【单选题】For someone who feels he must act, it is very likely that______.
A.
he will become a film star at long last
B.
he will be well paid
C.
he will end up without becoming a film star
D.
he will become a stage manager
【简答题】We had a very ____________ (tire) day yesterday.
【简答题】He looks very tired . He ____ to bed too late last night . A．must go B．must have gone C．could go D．didn''t go
【单选题】He was taken away by the police. He _________ a very serious crime.
A.
must be committed
B.
was being committed
C.
must commit
D.
must have committed
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