The government is trying to find a way to deal with the problem of pollution______(effective)填什么,为什么?

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• The government is trying to find a way to deal with the problem of pollution______(effective)填什么,为什么?
• The government is trying to find a way to deal with the problem of pollution______(effective)
• The local government is trying all out to find out who is______the forest fire．The local government is trying all out to find out who is the forest fire． A．to blame for starting B．to blame to start C．to be blamed for starting D．to be blamed to start
• “You have already sung?” the rich woman said in( with) surprise. in还是用with?“You have already sung?” the rich woman said in with surprise. in还是用with?“But I have already sung.”Mr. Brown said. “I can’t sing twice (at )in one night . at还是用 in? 谢 谢!