The rules require that ______you only one guest to the dinner. But they requires______ 
#90292
A
will bring; reforming
B
should bring; to reform
C
bring; reforming
D
have brought; to be reformed
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Class regulations require _____ is the last to leave the classroom _____ off all the lights.
#90190
A
who; should turn
B
whom; shall turn
C
whomever; turns
D
whoever; turn
 It was playing computer games that cost the boy plenty of time he ____ doing his lessons.
#89110
A
might have spent
B
ought to have spent
C
must have spent
D
could have spent
I________through that bitter period without your generous help.
#86828
A
couldn't have gone
B
didn't go
C
wouldn't go
D
hadn't gone
Without electricity human life _____ quite different today.  
#87207
A
is
B
will be
C
would have been
D
would be