Find the mistake which needs correction

What do you do if you won the first prize of the lottery?
A.do you do
B.first
C.prize
D.the lottery

If you ___ (CTRL + s), you ___ the file.
A.press – have saved
B.could press – could save
C.have pressed – save
D.press – will save

 

____, please paint the windows before you leave

 
A.If you’ll have enough time               
B.If you have enough time
C.Unless you have enough time
D.Unless you can have enough time

The bench would collapse if they___on it.
A.stood
B.stand
C.standing     
D.stands

She_____ terribly upset if I lost the ring.
A.will be
B.would be
C.were
D.had been

It is a pity that we will not be wearing tartan kilts. The ceremony ___ so much nicer!
A.will look
B.would look
C.were looking
D.looked

I wouldn’t go there at night if I ___ you.
A.am
B.was
C.were
D.had been

Find the mistake which needs correction

If we will reduce the speed of population growth, there will be less pressure on the earth.
A.will reduce
B.population growth
C.less   
D.on

Knowing several ___ helpful if you work for an international corporation.
A.languages are            
B.language is                  
C.languages is
D.language are

The charity received £50,000 from an anonymous________ .
A.volunteer 
B.provider
C.donor
D.offer