Cho các dãy số $ \left( {{u}_{n}} \right),\left( {{v}_{n}} \right) $ và $ \lim {{u}_{n}}=a,\lim {{v}_{n}}=+\infty $ thì $ \lim \dfrac{{{u}_{n}}}{{{v}_{n}}} $ bằng
A.$ 0. $
B.$ 1. $
C.$ +\infty . $
D.$ -\infty . $

Thu gọn biểu thức  $ \dfrac{3x+5}{4{{x}^{3}}y}-\dfrac{5-15x}{4{{x}^{3}}y}$ ta được
A.$ \dfrac{9}{2{{x}^{2}}y} $.
B.$ \dfrac{9x+5}{2{{x}^{2}}y} $.
C.$ \dfrac{-3}{{{x}^{2}}y} $.
D.$ \dfrac{3}{{{x}^{2}}y} $.

Hai phân thức gọi là đối nhau nếu
A.Tích của chúng bằng -1.
B.Tổng của chúng bằng 1.
C.Tích của chúng bằng 1.
D.Tổng của chúng bằng 0.

Find the word which has a different sound in the part underlined.
A.approach
B.applied
C.career
D.alternative

Find the word which has a different sound in the part underlined.
A.mechanic
B.chef
C.character
D.architect

Find the word which has a different sound in the part underlined.
A.understand
B.bundle
C.custom
D.burn

Find the word which has a different sound in the part underlined.
A.responsive
B.housework
C.hospital
D.decision

Find the word which has a different sound in the part underlined.
A.calm
B.skilful
C.cultivation
D.logical

Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to the following question.
My brother _____ a car two months ago.
A.bought
B.buying
C.buys
D.buy

Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to the following question.
The feeling of fulfillment comes _____ helping the community and other people.
A.to
B.with
C.from
D.away