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A.Professor began his class by holding up a glass with some water in it. He held it up for all ...

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and then he began    when he began    to begin    than he began  
by train    by the train    on train    in train  
1970; the 50’s    the 1970; his 50s    the 1970s; his fifties    1970s; his fifties  
on his fifty    at age of fifty    when he fifty    in his fifties  
by train    by the train    on train    in train  
started out    launched into    began on    worked at  
had he began   did he begin    he began    he had began  
did he begia   ead he beans   he began   he has began  
did his father come in that the boy began    his father came in that the boy began    did his father come in did the boy begin    his father came in did the boy begin  
and then he began    when he began    to begin    than he began  
placed    hid    laid    buried  
did his father come in; the boy began  his father came in; did the boy begin  did his father come in; did the boy begin  his father came in; the boy began  
Sit    Sitting    To sit    Sat  
has finished; began    had just finished; had begun    had just finished; was about to begin    just finished; began  
since    before    as early as    while
  
might have    might have had    may have    ought to have had  
began this program   this program began   did this program begin   this program did begin  

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