The humans are destroying nature day by day, ________ of course, will cause severe punishment from it sooner or later. 
#73318
A
who
B
when
C
on which
D
which
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______satisfies me is________we can pay for all this.
#74116
A
It; that
B
That; how
C
what ; that
D
As; that
The river______ are covered with trees is polluted.
#74034
A
of which the banks
B
whose banks
C
the banks of which
D
A,B,C are right
_____ this instrument should have put its work permit number on the box.
#73281
A
Who checked
B
Whoever inspected
C
No matter who examined
D
Those who estimates