Unless you ……all of my questions, I can’t do anything to help you.
A.answered
B.answer 
C.would answer    
D.are answering

It’s a tremendous task to so I’m rather pessimistic about Roger’s chances. Even if he ___ how to begin.
A.shows
B.were shown       
C.has shown       
D.showed

I still regret I didn’t have a camera. I ___ some photographs of the bird.
A.would have taken       
B.would certainly take
C.could maybe take       
D.had better take

They should think we are a group of new tourists. Let’s look surprised as if we ___ here for the first time.
A.would be       
B.have been           
C.are
D.were

-"_____________do you visit your hometown?" — '“Once a year.”
A.How long 
B.How far
C.How often
D.How much

After you country joins the EU, competition in this field will get even stronger. Unless a miracle ___, his firm must fail.
A.would happen   
B.will happen       
C.happens
D.will have happened

___ I helped him last week, he wouldn’t be in such trouble now.
A.Had
B.Were
C. If       
D.Unless

Now that you’re through with it, you should be more grateful to Ted for all his help. Do you think ___ without it?
A.you would have succeeded
B.would you succeed
C.you might succeed           
D.you would succeed

You are a smoker yourself, Mr Parker. How did you find out someone ___ in your study?
A.had to be smoking       
B.was smoking   
C.has been smoking       
D.had been smoking

___ she to call you immediately, what would you do?
A.Do
B.If
C.Unless
D.Were