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They spent all their spare time ______ their spare money, on their experiments.

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spending    to spend    having spent    to have spent  
spending    to spend    having spent    to have spent  
is spent   spent   to spend   to be spent  
spending    being spent    to spend    spent  
devoted; wouldn't have taken  spent; wouldn't have taken  hadn't devoted; hadn't taken  hadn't spent; couldn't take  
devoted; wouldn’t have achieved    spent; wouldn’t have achieved    devoted; hadn’t achieved    hadn’t spent; couldn’t achieve  
devoted; wouldn't have taken    spent; wouldn't have taken    had devoted; hadn't taken    had spent; couldn't take  
spent; wouldn't have taken    devoted; wouldn't have taken    hadn't devoted; hadn't taken    hadn't spent; couldn't  
devoted; wouldn’t have taken    spent; wouldn’t have taken    had devoted; hadn’t taken    had spent; couldn’t take  
spending    to spend    having spent    spent  
is spent   spent   to spend   to be spent  
spent    to spend    to be spent    is spent  
devoted; wouldn't have taken    spent; wouldn't have taken    had devoted; hadn't taken    had spent; couldn't take  
devoted; wouldn't have taken    spent; wouldn't have taken    had devoted; hadn't taken    had spent; couldn't take  
devoted; wouldn't have taken  spent; wouldn't have taken   hadn't devoted; hadn't taken  hadn't spent; couldn't take  
wouldn’t take    wouldn’t have taken    hadn’t taken    couldn’t take  
devoted; wouldn’t have taken   spent; wouldn’t have taken   hadn’t devoted; hadn’t taken   hadn’t spent; couldn’t take  
which   whom   that    whatever  
devoted; wouldn’t have taken  spent; wouldn’t have taken  hadn’t devoted; hadn’t taken  hadn’t spent; couldn’t take  
spending    to have spent    being spent    to spend  

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