Ở tai giữa của con người tồn tại bao nhiêu loại xương ?
A.4.
B.5.
C.3.
D.2.

Đâu không phải biện pháp bảo vệ tai ?
A.Nghe nhạc to hết cỡ.
B.Không dùng que nhọn.
C.Không làm ở những nơi có tiếng ồn nhiều.
D.Dùng tăng bông để lấy ráy tai ngoài ống tai.

Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to the following question.
I hope that Vietnamese athletes will ________ the next SEA Games.
A.domination
B.dominant
C.dominate
D.dominating

Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to the following question.
Tomorrow we are having a ________ on Viet Nam and ASEAN during one of our English classes.
A.discussion
B.participation
C.thought
D.concentration

Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to the following question.
Vietnam is governed by a party that believes in socialism. It is a ________ country.
A.monarchy
B.kingdom
C.capitalist
D.socialist

Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to the following question.
A group of people who are elected to govern an area such as a city or county is called a ________.
A.community
B.council
C.association
D.union

Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to the following question.
His ________ came to America from Ireland hundreds of years ago.
A.roots
B.governments
C.siblings
D.ancestors

Cho hình chóp $ S.ABC $ với $ AB=c, BC=a, AC=b $ . Gọi  $K$  là trung điểm của cạnh  $SA$. $M, N$ lần lượt thuộc cạnh $ SC, SB $  sao cho $ \dfrac{SM}{SC}=\dfrac{SN}{SB}=\dfrac{1}{3} $ . Giao tuyến giữa $(KMN)$ và $(ABC) $ là $d$.  $ d\cap AC=E,d\cap AB=F $ . Giá trị  $ EF $ bằng
A.$ a $.
B.$ \dfrac{b}{2} $.
C.$ \dfrac{2b} 3 $.
D.$ \dfrac{c}{3} $.

Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to the following question.
We went to the sale expecting to buy a lot, but we came away ________.
A.empty-handed
B.right-handed
C.left-handed
D.full-handed

Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to the following question.
Jane was invited to stay with a ________ family in Laos.
A.situated
B.local
C.location
D.conditional