Điều kiện xác định của phân thức $ \dfrac{2\text{x}+1}{{{x}^{2}}-5\text{x}+6} $ là
A.$ x
e 3;x
e 2 $.
B.$ x
e -3 $.
C.$ x < 2 $.
D.$ x > 3 $.

Điều kiện xác định của phân thức $ \dfrac{5\text{x}+1}{{{x}^{2}}+2\text{x}+4} $ là
A.$ x < -2 $.
B.$ x > 3 $.
C.Luôn xác định.
D.$ x
e 2 $.

Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the following questions
They still haven’t make a decision _______ to the new color scheme
A.by contrast
B.in view
C.on reflection
D.with regard

Mark the letter A, B, C, or D to indicate the correct answer to each of the following questions.
You know times have been bad lately, Peter, but keep your _______up; things are bound to get better soon.
A.mind
B.head
C.socks
D.chin

Mark the letter A, B, C, or D to indicate the correct answer to each of the following questions.
I just couldn’t remember her name even though it was on the ______ of my tongue.
A.edge
B.front
C.top
D.tip

Mark the letter A, B, C, or D to indicate the correct answer to each of the following questions.
I didn’t suspect anything at first, but when I noticed her going through the office drawers I began to smell______.
A.a rat
B.a thief
C.a pig
D.a culprit

Mark the letter A, B, C or D on your answer sheet to indicate the correct answer to each of the following questions.
According to a recent survey, most people are on good _______ with their neighbours
A.relations
B.terms
C.acquaintance
D.relationships

Choose A, B, C, or D to indicate the correct answer to the following question. When I was a child, I collected a/an ______ of poems.
A.anthology
B.family
C.pack
D.set

Mark the letter A, B, C, or D to indicate the correct answer to each of the following questions.
Before she left for Australia she promised her parents that she would drop them _______ at least once a month
A.a line
B.a note
C.a word
D.the news

Mark the letter A, B, C, or D to indicate the correct answer to each of the following questions.
“What’s wrong with Tom today? He’s unusually quiet,” - “He’s got something on his ______. I expect”.
A.brain
B.mind
C.brow
D.thoughts