A.\( - 12\)
B.\( - 4\)
C.\( - 8\)
D.\(8\)

A.\(y = {x^3} - 3x + 2\)
B.\(y =  - {x^4} + 2{x^2} - 2\)
C.\(y =  - {x^3} + 3{x^2} + 2\)
D.\(y = {x^3} - 3{x^2} + 2\)

A.down
B.on
C.aside
D.out

A.dedicated
B.given
C.devoted
D.sacrificed

A.were studying
B.have been studying
C.had been studying
D.are studying

A.The less you study
B.The more you study
C.The most you study
D.The more and more you study

A.respiratorily
B.respiration
C.respirator
D.respiratory

A.have you
B.had you
C.haven’t you
D.been you

A.down
B.on
C.aside
D.out

A.Facebook is great as long as not too much time is spent on.
B.Facebook is not as good as TV.
C.Users should spend more time on Facebook.
D.The best use of Facebook is to share photos and messages.