That____________ by gases was established only recently.  
A.surrounding the earth         
B.surrounded the earth
C.the earth is surrounded    
D. the earth suưounded

A: I don’t like watching football. B: _________.
A.So do I, it’s my favourite sport. 
B.I don’t either, shall we watch something else?
C.I will turn it up for you. 
D. I don’t too, shall we do something else?

If you are seated when a newcomer enters the room, stand up to be greeted or _________   .
A.introduces himself     
B.introduce              
C.introduction   
D. introduced

The elderly person whose family moves to a new city may find it ____ to make friendsof similar age.
A. particularly hard      
B.particular, hard
C.hardly particular        
D.hard, particularly

A.event          
B.athlete  
C.between  
D.Result

A: How do I get to the supermarket? B: ___________
A.Easy, turn left at the comer.     
B.Good idea, we need some food.
C.Ok, I’ll order a takeaway.      
D.You can get well.

Even though many couples _______ smaller families, the number of births could rise.
A.now having 
B.now has    
C.are now having      
D.is now having

The man ________ to safety was in his forties.
A.who was lifting     
B.lifting          
C. lifted       
D. having been lifted

It was the first time I  _______in such an important match.
A.was ever playing     
B. have ever played
C.have ever been playing   
D.had ever played

You should have your air conditioner serviced, _______   
A.however
B. otherwise 
C.if so      
D.consequently