A:(-∞,1]
B:(-∞,0]
C:(-∞,0)
D:(0,+∞)
A:(e-1,1)
B:(1,e)
C:(0,1)
D:(0,e-1)
A:a=-1,b=2
B:a=-4,b=-9
C:a=-1,b=9
D:a=-8,b=-10
A:21
B:8
C:6
D:7
A:(a,2a)
B:(2a,a)
C:(-a,-2a)
D:(-2a,-a)
A:what
B:that
C:which
D:how
A:that; what
B:what; what
C:that; that
D:what; that
A:which
B:what
C:whose
D:whom
A:that
B:it
C:what
D:which
A:What; what a
B:What; how
C:That; how
D:That; what
A:what
B:how
C:when
D:whom
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