A.\(y = {\left( {\dfrac{2}{\pi }} \right)^x}\)
B.\(y = 0,{5^{ - x}}\)
C.\(y = {x^3}\)
D.\(y = {\log _{\dfrac{1}{3}}}x\)

A.\(15\)
B.\(10\)
C.\(20\)
D.\(5\)

A.\(y = \dfrac{{x - 1}}{{x - 2}}\)
B.\(y =  - {x^3} - 3x\)
C.\(y = \dfrac{{x + 1}}{{x + 3}}\)
D.\(y = {x^3} + x\)

A.\(\dfrac{2}{{189}}\)
B.\(\dfrac{{21}}{{200}}\)
C.\(\dfrac{{20}}{{189}}\)
D.\(\dfrac{1}{2}\)

A.Unless
B.Whether
C.Provided that
D.Even if

A.unless
B.whether
C.if
D.as long as

A.Only if
B.Even if
C.Unless
D.In case

A.Me, too. School was fun.
B.I thought school was hard.
C.Me, too. I couldn't wait to graduate.
D.Life is hard.

A.not later than
B.no later than
C.as late
D.late as

A.the much
B.the more
C.the most
D.the