Choose the underlined part that needs correction in the following sentence
It is significantly that Tom come back home before 10 p.m.
A.before
B.significantly
C.that
D.come

Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to the following question.
The teacher insists that she ___________ the classroom until she finishes her breakfast.
A.not to enter
B.not enter
C.to not enter
D.not entering

Choose the underlined part that needs correction in the following sentence
The school principal insist that she resign from her post as deputy head immediately.
A.post
B.resign
C.as
D.insist

Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to the following question.
The government demanded that all children _____________ to go to school.
A.be allowed
B.allowed
C.allow
D.are allowed

Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to the following question.
The laws demand that all people ____________ to raise questions about the policy.
A.allowed
B.be allowed
C.allow
D.to allow

Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to the following question.
My mother demanded that the central heating ________ immediately.
A.is repaired
B.to be repaired
C.be repaired
D.repaired

Choose the underlined part that needs correction in the following sentence
Tom’s girlfriend proposes that she be waiting in his apartment when he get home.
A.get
B.when
C.proposes
D.be waiting

Cho chuỗi thức ăn sau: Cây lúa $ \to $ Sâu đục thân $ \to $Chim sâu $ \to $ Cáo $ \to $ Đại Bàng $ \to $ Vi sinh vật.
Các sinh vật như cây lúa, sâu đục thân, chim sâu, cáo, … trong chuỗi thức ăn trên được gọi là gì?
A.Xích đu.
B.Mắt xích.
C.Dây xích.
D.Sợi xích.

Sinh vật bắt đầu một chuỗi thức ăn là
A.sinh vật sản xuất.
B.động vật.
C.sinh vật tiêu thụ.
D.sinh vật phân giải.

Sinh vật nào là mắt xích cuối cùng trong chuỗi thức ăn hoàn chỉnh?
A.Vi sinh vật phân giải.
B.Thực vật.
C.Động vật ăn thịt.
D.Động vật ăn thực vật.