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

Mark the letter A, B, C or D on your answer sheet to indicate the correct answer to the following question.
Sam confessed_______ all the cookies.
A.eating
B.eat
C.to eating
D.to eat

Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to the following question.
No one enjoys _______ in public.
 
A.making fun of
B.to make fun of
C.to be made fun of
D.being made fun of

Mark the letter A, B, C or D on your answer sheet to indicate the correct answer to each of the following questions.
Mr. Pitt has demonstrated his ability to handle many difficult problems when _______ with a challenge.
A.faces
B.face
C.facing
D.faced

Mark the letter A, B, C or D on your answer sheet to indicate the correct answer to each of the following questions.
______, Joe was annoyed to find that he had left his key at the coffee shop.
A.To have just returned to his office
B.After returned to his office
C.Having been returned to his office
D.Upon returning to his office

Mark the letter A, B, C or D on your answer sheet to indicate the correct answer to the following question.
She locked the door of her room all day yesterday to avoid____________.
 
A. to disturb
B.to be disturbed
C.being disturbed
D.disturbing

Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to the following question.
The restaurants on the island are expensive, so it’s worth________a packed lunch.
A.take
B.taken
C.taking
D.to take

Mark the letter A, B, C or D on your answer sheet to indicate the correct answer to the following question.
She ________ driving to the station every day but then she suddenly decided to walk instead.
A.had used to
B.used to
C.didn’t used to
D.was used to