The word "it" refers to _________.
 
A.industrial architecture
B. internal iron skeleton   
C. stone 
D.strength

Iron replaced stone and timber in the building of bridges because iron was considered ______. 
A.more beautiful     
B.new and modern  
C. much stronger
D.easier to transport

The topic of this passage is _______________.
A.reactions to foods  
B.food and nutrition      
C. infants and allergies     
D.a good diet

If you want your son to do better on his exams, I suggest he ________ harder.
A.will study  
B.studies 
C.would study     
D.study

In Vietnam, two or more __________ may live in a home.
A.generations
B.generous    
C.generalizations      
D.generators

We are worried ________ the current situation of environmental pollution in our country.
A.of           
B. about      
C.on       
D.at

“Don’t worry about your necklace. Give it to me and I promise to ______ great care of it.”
A.bring
B.take    
C.keep       
D.make

Tom said that he ________ his motorbike the day before.
A. had lost    
B. lost    
C. has lost     
D.lose

Members of my family share the ______.
A.housewife     
B.hometown
C. homework 
D.housework

can’t ______ this noise any longer. I’m going to write a letter of complaint about this problem.
A. get back to  
B.take away from    
C.put up with    
D.make out of