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.ore is transporting
B.how ore is transported
C.transporting ore
D.to transport ore

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.was used to
B.used to
C.didn’t used to
D.had used to

Mark the letter A, B, C or D on your answer sheet to indicate the correct answer to the following question.
I am angry because you didn’t tell me the truth. I don’t like ________.
A.have deceived
B.deceiving
C.to deceive
D.being deceived

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.facing
B.face
C.faced
D.faces

Trùng kiết lị có đặc điểm:
A.Di chuyển bằng roi, sinh sản theo kiểu phân đôi.
B.Di chuyển bằng chân giả, sống phổ biến ở biển.
C.Di chuyển bằng chân giả rất ngắn, kí sinh ở thành ruột.
D.Di chuyển bằng lông bơi, sinh sản theo kiểu phân đôi và tiếp hợp.

Mark the letter A, B, C or D on your answer sheet to indicate the correct answer to each of the following questions.
Mrs. Wilkinson is very helpful in ______ books in the library that encompass the period of the Renaissance
A.located
B.will locate
C.to locate
D.locating

Trong các loại tia: Rơn-ghen, hồng ngoại, tự ngoại, đơn sắc màu lục; tia có tần số nhỏ nhất là
A.tia đơn sắc màu lục.
B.tia tử ngoại.
C.tia hồng ngoại.
D.tia Rơn-ghen.

Ở ngoài tự nhiên, trùng kiết lị thường tồn tại ở dạng
A.trùng kiết lị non.
B.trứng.
C.trùng kiết lị trưởng thành.
D.bào xác.

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.After returned to his office
B.Upon returning to his office
C.To have just returned to his office
D.Having been returned to his office

Mark the letter A, B, C or D on your answer sheet to indicate the correct answer to the following question.
They denied _______ there.
 
A.have been
B.to have been
C.having been
D.to having been