Supephotphat kép có công thức hóa học là:
A. $ Ca{{\left( { H _ 2 }P{ O _ 4 } \right)}_ 2 } $
B. $ {{\left( N{ H _ 4 } \right)}_ 2 }HP{ O _ 4 } $
C. $ {{\left( N{ H _ 2 } \right)}_ 2 }CO $
D. $ ~N{ H _ 4 }Cl $

Mark the letter A, B, C, or D on you answer sheet to indicate the sentence that best combines each pair of sentences in the following questions.
The teacher gave some instructions. I don’t understand any of them.
A.(2) It was the instructions the teacher gave that confused me.
B.(1) The instructions the teacher gave are not understanding to me.
C.(3) It hasn’t been clear to me about the instructions given by the teacher
D.(4) I’m finding it difficult to figure out what the teacher required according to his instructions

Mark the letter A, B, C or D to indicate the sentence that best combines each pair of sentences in the following questions.
Everyone was watching the little dog. They were greatly amused at it.
A.(2) The little dog was watching everyone with great amusement.
B.(4) The little dog was greatly amused by the way everyone was watching it.
C.(3) Everyone was greatly amused at the little dog they were watching.
D.(1) Everyone felt great and amused when the little dog was watching them.

Nối phép tính với kết quả thích hợp
80 : 16
80 : 10
80 : 40
80 : 8 : 5
80 : 2 : 8
80 : 2 : 5
Làm lại
A.12
B.23
C.31
D.

Điền đáp án đúng vào ô trống
Có 2 bạn học sinh, mỗi bạn mua 5 quyển vở cùng loại và tất cả phải trả 18000 đồng. Tính giá tiền mỗi quyển vở.
Đáp án :   (đồng)
 
A.1800
B.
C.
D.

Mark the letter A, B, C or D to indicate the sentence that best combines each pair of sentences in the following questions.
There was a terrible flood. All villagers, who had received a warning of the impending flood, escaped to safety.
A.(1) All of the villagers had been warned but only some escaped.
B.(4) Only some of the villagers had been warned and all escaped.
C.(2) All of the villagers had been warned and all escaped.
D.(3) Only some of the villagers had been warned and only some escaped.

Chọn đáp án đúng:
Trong hình vẽ dưới đây có bao nhiêu cặp đường thẳng song song với nhau?
1
2
3
4
A.answer2
B.
C.
D.

Chọn đáp án đúng
Hai đường thẳng trong hình vẽ sau song song với nhau, đúng hay sai?
Đúng
Sai
A.answer1
B.
C.
D.

Chọn đáp án đúng
Hai đường thẳng trong hình vẽ sau song song với nhau, đúng hay sai?
Đúng
Sai
A.answer2
B.
C.
D.

Nhìn hình vẽ chọn câu đúng
Hai đường thẳng trong hình vẽ song song với nhau.
Hai đường thẳng trong hình vẽ cắt nhau.
Hai đường thẳng trong hình vẽ vuông góc với nhau.
A.answer1
B.
C.
D.