__________ , some students tend to develop a range of unhealthy habits .
#91470
A
Parents don’t watch over them
B
Not having watched over
C
With no parents to watch over them
D
Parents watched over
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So desperate ______ that no one could help another, each ____ to save himself and his animals.
#91335
A
was the situation; was trying
B
the situation was; trying
C
the situation was; was trying
D
was the situation; trying
He refused to sell the old house, for it had too many pleasant ________with his childhood. 
#91529
A
associations
B
communications
C
contacts
D
combinations