must be extremely careful vs must extremely be careful

Some examples from the web:

• We must be extremely careful about that.
• We must be extremely careful what goods we take in exchange.
• I think we must be extremely careful here.
• As this key date is so close, I believe that we must be extremely careful with what is drawn up.
• I share your judgment that we must be extremely careful in dealing with such dangerous substances in all areas.
• I do believe that we must be extremely careful that the small delegations do not feel excluded.
• All industries are suffering and we must be extremely careful with the hard-pressed taxpayer's funds to ensure that we do not throw too much more of it into the car industry.
• The Commission would note that the online market is developing and we must be extremely careful not to restrict its potential with an overly rigid approach.
• On the other hand, we must be extremely careful about authorising new technologies if we do not know for certain that they are harmless to health, the environment and animal welfare.
• Until genuine economic equality has been achieved the Commission must be extremely careful not to impose rigorous harmonisation which could lead to a reversal of gains already made.
• In financial terms, the EU is at present in danger of benefiting the 'bad guys' and penalising the 'good guys', and we must be extremely careful not to do this.
• However, and I think this is what concerns numerous members, we must be extremely careful as to the methods and means we use in order to provide fast and immediate relief to this vulnerable economic sector.
• In the last couple of years I have seen that there is something of an addiction to gesture politics here, which is something we must be extremely careful to avoid in our relationships with the United States of America.
• My fifth point is that we must be extremely careful to ensure that the aid actually reaches the target groups who are genuinely in need.
• As in the case of support for competitiveness, the Commission must be extremely careful to envisage the economic diversification of banana-dependent areas only where such an option is mentioned in multi-annual national strategy papers.
• "We must be extremely careful before we burn any bridges we have when we deal with the United States", since they are the UK's "biggest trading and investment partner".
• "We must be extremely careful before we burn any bridges we have when we deal with the United States", since they are the UK's "biggest trading and investment partner".
• We must therefore be extremely careful when passing on this message to society.
• The European Commission has to be extremely careful.
• Whatever arrangements you made with him, you need to be extremely careful moving forward.

Some examples from the web:

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