Saying what is necessary, We really must change it then, We need to replace the.., It needs draining first, Saying something is a good idea, We should use nickel or titanium, We ought to use more resistant materials, I'd better tell him, Asking for and making a prediction, How long will the work take?, It will wear out more quickly., I won't last long., It should take 2 men about 6 hours, Promise/Decision, I'll schedule the manpower, I'll do that, Making request/order, Will you give me list of ..?.

Problem solving

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