Instructions: You are given an English sentence with a blank, and you need to predict the missing word. After completing, the whole sentence should be gramatically correct and non-ambiguous.
Input: it's ____ seldom matthew sets his mind on anything that when he does i always feel it's my duty to give in and as for the risk there's risks in pretty near everything a body does in this world there's risks in people's having children of their own if it comes to that they don't always turn out well
Output:
so