Phát biểu nào sau đây đúng ?
A.Công thức đơn giản nhất là công thức biểu thị số nguyên tử của mỗi nguyên tố trong phân tử.
B.Công thức đơn giản nhất là công thức biểu thị tỉ lệ số nguyên tử C và H có trong phân tử.
C.Công thức đơn giản nhất là công thức biểu thị tỉ lệ tối giản về số nguyên tử của các nguyên tố trong phân tử.
D.Công thức đơn giản nhất là công thức biểu thị tỉ lệ phần trăm số mol của mỗi nguyên tố trong phân tử.

Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to the following question.
My best friend _____ kind. She writes poems for me.
A.has
B.have
C.are
D.is

Choose the sentence that has the same meaning as the root one.
The garden is too small to play football in.
A.The garden isn’t big enough to play football in.   
B.The garden is such small that to play football in.
C.The garden is so small not to play football in. 
D.The garden is small enough to play football in.

Choose the sentence that has the same meaning as the root one.
They are building a new bridge over the river.
A.A new bridge is building over the river.
B.A new bridge is being built over the river.
C.A new bridge is built over the river.
D.A new bridge is going to build over the river.

Choose the sentence that has the same meaning as the root one.
She hasn’t visited her hometown for two years.
A.She didn’t visit her hometown for two years.  
B.She last visited her hometown two years ago
C.She didn’t visit her hometown two years ago.
D.She visited her hometown for two years.  

Choose the sentence that has the same meaning as the root one.
People grow rice in tropical countries.
 
A.Rice is grown in tropical countries.  
B.Rice were grown in tropical countries.
C.Rice was grown in tropical countries.
D.Rice are grown in tropical countries.

Trai nhận được những gì từ dòng nước qua ống hút?
A.Nước.
B.Ôxi.
C.Thức ăn.
D.Thức ăn và ôxi.

Choose the sentence that has the same meaning as the root one.
People don’t trust him because he tells lies.
A.If he doesn’t tell lies people would trust him.
B.If he not tell lies, people will trust him.
C.If he didn’t tell lies, people will trust him.
D.If he didn’t tell lies, people would trust him.

Choose the sentence that has the same meaning as the root one.
It is a pity that Peter isn’t here.                    
A.I wish Peter were here.
B.I wish Peter be here.
C.I wish Peter can be here.  
D.I wish Peter is here.  

Choose the sentence that has the same meaning as the root one.
No one has asked me that question before.
A.That question has never been asked me before by anyone.
B.That question has ever been asked me by no one before.
C.I have never been asked that question before.
D.I have ever been asked that question before.