Chất kháng sinh pênixilin được sản xuất từ một loại
A.nấm men.
B.mốc tương.
C.mốc xanh.
D.mốc trắng.

Đa số nấm sinh sản bằng hình thức nào?
A.Tiếp hợp.
B.Phân đôi.
C.Bào tử.
D.Nảy chồi.

Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to the following question.
- How ……………… does it take to walk from your house to the grocery store?
- About 15 minutes.
A.many
B.distant
C.long
D.far

Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to the following question.
I am sure that there will be………………cars.
A.self-fly
B.flying
C.flied
D.fly

Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to the following question.
This is not my pencil case. It is……………….
A.yours
B.you
C.her
D.their

Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to the following question.
I ……………….you since 2003.
A.will not meet
B.will meet
C.haven’t met
D.didn’t meet

Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the following questions.
You are old enough to take _______ for what you have done.
A.responsibility
B.irresponsible
C.responsibly
D.responsible

Choose the answer among A, B, C, D to complete each of the sentences below:
Stress and tiredness often lead to lack of _______.
A.concentrator
B.concentrated
C.concentration
D.concentrate

Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to the following question.
It can be an amazing experience for those who have the ______ to leave their family and friend and live in a new place.
A.encourage
B.courageous
C.courage
D.encouragement

Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the following questions.
He was turned down for the job because he is _______________.
A.qualification
B.qualifying
C.unqualified
D.qualified