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 

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.was awarded
B.awarding
C.awarded
D.having awarded

Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to the following question.
I clearly remember ________ you about this before.
A.telling
B.being told
C.to tell
D.tell

Mark the letter A, B, C or D on your answer sheet to indicate the correct answer to the following question.
I must warn you I am not used to _______so rudely.
A.speak
B.being spoken to
C.speak to me
D.be spoken to

Mark the letter A, B, C or D on your answer sheet to indicate the correct answer to the following question.
_______ to learn about human origins and evolution, the physical anthropologist studies fossil remains and observes the behavior of other primates.
A.In trying
B.Because trying
C.Do they try
D.There is trying