Nobody could have guessed, in those days, the place in history that Martin Luther King, Jr ____. 
#103711
A
was having
B
was to have
C
had had
D
Had
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 Now we have arrived at the lake. But the view I photographed that day ________ any more.
#99469
A
doesn't exist
B
isn't existing
C
hasn't existed
D
hadn't existed
--Why does the lake smell terrible? -- Because a large amount of water_______.
#99621
A
have polluted
B
is being polluted
C
has been polluted
D
have been polluted