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I often keep     my homework for four hours. A. doing B. to doing C. to do

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doing ; doing    to do ; to do    to do ; do    do ; doing  
How soon    How often    How long    How much  
to keep    keeps    keeping    kept  
that I had finished my homework    that had I finished my homework    whether had I finished my homework    if I had finished my homework  
is doing my homework    am doing my homework    is doing our homework    are doing our homework  
if I hace finished my homework    if my homework had finished or not    whether or not had I finished my homework    whether I had finished my homework  
did my homework    am doing my homework    do my homework    was doing my homework  
How soon    How often    How long    How much  
do    doing    to do    did  
do    doing    to do    did  
to listen    not listen    not to listen    listening  

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