Câu 6. Tìm các giá trị thực của tham số \(m\) để hàm số \(y=\dfrac{1}{3}x^3-mx^2+\left(m^2-4\right)x+3\) đạt cực đại tại x = 3.

A. \(m=1,m=5\)

B. \(m=5\)

C. \(m=1\)

D. \(m=-1\)

1, When his sister died, Jack took on the task of raising her three children. (burden)

\(\rightarrow\) It was Jack who ___________________________ three children when she died.

Question 12: _______________ , overusing it can negatively affect one's mental and emotional health.

A. However social media impacts may be harmless

B. Although harmless social media impacts may be

C. Harmless as social media impacts may be

D. Harmless social media impacts may be but

Question 13: The Neanderthals could have become extinct as a result of ______________ by modem humans.

A. deliberately exterminating

B. having been deliberately exterminated

C. being deliberately exterminated

D. they were deliberately exterminated

Question 14: _______________ such rich symbolism and moral philosophy as within the classical literature of India and China.

A. Only once have historical dramas and folk tales been imbued in

B. Nowhere else have historical dramas and folk tales been imbued with

C. Never before have historical dramas and folk tales imbued in

D. Wherever else have historical dramas and folk tales been imbued with

Vietnamese woodworkers are famous for their intricate carvings, which ___________ (find) on everything from furniture to decorative objects.

IV, Complete these sentences using an appropriate modal construction with the verbs in brackets:
1, If he had been doing his job properly, he really (review) ........................... the situation more than once a year.
2, Survivors felt there (be) ........................... an investigation last year into the cause of the disaster.
3, His annual income is reported (grow) ........................... rapidly over the last few years.
4, Only after they (watch) ........................... the documentary, did they contribute to the Save the Wolves fund.
5, We owe it to future generations (ensure) ........................... we spend enough tax money on green energy alternatives.

Question 19: ____________ , overusing it can negatively affect one’s mental and emotional health.

A. However social media impacts may be harmless

B. Although harmless social media impacts may be

C. Harmless as social media impacts may be

D. Harmless social media impacts may be but