B4

If you pick up a starving dog and make him prosperous, he will not bite you. This is the principal difference between a dog and a man. (Mark Twain)
(1-й conditional)

 PICK

B5

If you don't know where you are going, probably you will end up somewhere else. (Laurence J. Peter)
(1-й conditional)

 END UP

B6

Youth would be an ideal state if it came a little later in life. (Herbert Henry Asquith)
(2-й conditional)

 BE

B7

Television is more interesting than people. If it were not, we would have people standing in the corners of our rooms. (Alan Corenk)
(2-й conditional)

 HAVE

B8

There are many things that we would throw away if we were not afraid that others might pick them up. (Oscar Wilde)
(2-й conditional)

 THROW

B9

If nobody spoke unless he had something to say, the human race would very soon lose the use of speech. (W. Somerset Maugham)
(2-й conditional)

 SPEAK

B10

If you aren't fired with enthusiasm, you will be fired with enthusiasm. (Vince Lombardi)
(1-й conditional)

 FIRE

B11

If we had no winter, the spring would not be so pleasant:if sometimes we didn't not taste of adversity, prosperity would not be so welcome. (Anne Bradstreet)
(2-й conditional)

 HAVE

 TASTE

B12

Could you imagine how horrible things would be if we always told others how we felt? Life would be intolerably bearable. (Randy K. Milholland)
(2-й conditional)

 BE

B13

If we all did the things we are capable of doing, we would literally astound ourselves. (Thomas A. Edison)
(2-й conditional)

 DO

B14

Most people would succeed in small things if they were not troubled with great ambitions. (Henry Wadsworth Longfellow)
(2-й conditional)

 SUCCEED

B15

If men were angels, no government would be necessary. (James Madison)
(2-й conditional)

 BE

B16

Many would be cowards if they had courage enough (Thomas Fuller)
(2-й conditional)

 HAVE

B17

If we couldn't laugh, we all would go insane. (Jimmy Buffett)
(2-й conditional)

 GO

B18

What a blessing it would be if we could open and shut our ears as easily as we open and shut our eyes! (Georg Christoph Lichtenberg)
(2-й conditional)

 CAN