Mark the letter A, B, C or D on your answer sheet to indicate the correct answer to each of the following questions.
It costs me a fortune, but I don’t regret_______ a year travelling around the world.
A.have spent
B.to spend
C.spent
D.spending

Phản ứng nào sau đây là phản ứng nhiệt nhôm?
A. $ 2\text{A}l+2NaOH+2{{H}_{2}}O\to 2NaAl{{O}_{2}}+3{{H}_{2}}. $
B. $ 2\text{A}l+3{{H}_{2}}S{{O}_{4}}\to A{{l}_{2}}{{(S{{O}_{4}})}_{3}}+3{{H}_{2}}. $
C. $ 3F\text{e}O+2\text{A}l\xrightarrow{{{t}^{o}}}3F\text{e}+A{{l}_{2}}{{O}_{3}}. $
D. $ 2\text{A}l+3CuS{{O}_{4}}\to A{{l}_{2}}{{(S{{O}_{4}})}_{3}}+3Cu. $

Mark the letter A, B, C or D on your answer sheet to indicate the correct answer to the following question.
Nowadays a large number of young people spend much time_________the Internet.
A.surfing
B.surfed
C.to surfing
D.to surf

Mark the letter A, B, C or D on your answer sheet to indicate the correct answer to each of the following questions.
When ______ the 2018 Oscar for the best Actor in a Supporting Role, Sam Rockwell thanked his mom and dad for
A.awarded
B.was awarded
C.awarding
D.having awarded

Choose the right answer:
Ms. Daniels, a wealthy entrepreneur, is reputed to have developed her wealth through _________ in the stock market.
A.invested
B.invests
C.invest
D.investing

Choose the best answer for the following questions
It costs me a fortune, but I don’t regret______a year travelling around the world.
 
A.have spent
B.spent
C.to spend
D.spending

Mark the letter A, B, C or D on your answer sheet to indicate the correct answer to the following question.
Sometimes, I do not feel like __________ to my sibling about my troubles.
A.talked
B.talk
C.talking
D.to talk

Mark the letter A, B, C or D on your answer sheet to indicate the correct answer to the following question.
As coal mines became deeper, the problems of draining water, bringing in fresh air, and_______to the surface increased.
A.how ore is transported
B.transporting ore
C.ore is transporting
D.to transport ore

Nhận xét nào dưới đây là đúng:
A.Các vật dụng bằng nhôm không bị oxi hóa trực tiếp và không tan trong nước do được bảo vệ bởi lớp màng \(A{l_2}{O_3}\).
B.Do có tính khử mạnh nên nhôm phản ứng với các axit \(HCl,{\rm{ }}HN{O_3},{\rm{ }}{H_2}S{O_4}\) trong mọi điều kiện.
C.Kim loại nhôm không tác dụng với nước do thế khử của nhôm lớn hơn thế khử của nước.
D.Trong phản ứng của nhôm với dung dịch NaOH thì NaOH đóng vai trò chất oxi hóa.

Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the following questions.
You should seriously consider _______ a dancer. You are such a great performer.
A.to become
B.become
C.will become
D.becoming