Cho các số $ x,y $ thỏa mãn $ {{x}^{2}}+{{y}^{2}}=xyx+2y $ . Khi đó bất đẳng thức nào sau đây là đúng ?
A.$ 0\le x\le \dfrac{2}{\sqrt{3}} $
B.$ x\le \dfrac{4}{3} $
C.$ \left| x \right|\le \dfrac{2\ \sqrt{3}}{3} $
D.$ \left| x \right|\,\le \dfrac{4}{\sqrt{3}} $

Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to the following question.
They __________ pingpong when their father comes back home.
A.would play
B.will be playing
C.play
D.will play

Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to the following question.
Next week at this time, you _____ on the beach.
A.is lying
B.will lie
C.will have lain
D.will be lying

Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to the following question.
She _______ at the factory when you ____ tomorrow.
A.will have been working / come
B.will be working / come
C.will have worked / come
D.is working / will come

Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to the following question.
_________ for the bus at 9 a.m next Monday?
A.Will you wait
B.Will you have been waiting
C.Will you be waiting
D.Are you waiting

Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to the following question.
In an hour I __________ my clothes.
A.will still iron
B.will still be ironing
C.will have still been ironing
D.have still ironed

Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to the following question.
I ______ your letter for you. I ________ a post-box.
A.will post / will pass
B.will post / will be passing
C.will be posting / will be passing
D.will post / have passed

Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to the following question.
At this moment tomorrow night I ________ on a ship.
A.am going to sleep
B.sleep
C.will be sleeping
D.will sleep

Mark the letter A, B, C, or D on your answer sheet to indicate the word that differs from the other three in the position of primary stress in each of the following questions
A.mobile
B.engine
C.laptop
D.device

Mark the letter A, B, C, or D on your answer sheet to indicate the word that differs from the other three in the position of primary stress in each of the following questions
A.autonomous
B.enormous
C.luminous
D.tremendous