4．The expression"go for it"comes from football．Not football as it played in most countries，but the kind of football in the Unites States and Canada．
American football is a difficult game to explain．But the basic idea is that each team tries to move the football across the goal line of the other team．One of the rules is that a team must move
the ball forward（向前）at least ten yards-a little less than ten meters-in four attempts．It loses the ball to the other team if if fails to move that far．
One of the most exciting times inn football comes when a team has failed，after three attempts，to move the ball forward ten yards．Then the team must tale an important decision．
One choice is to try a fourth and final time．If the team succeeds，it keeps the ball．And continues to move forward．But if if fails，the other team gets the ball at that place on the field．
The second choice is to kick the ball．The team gives up the ball if it makes this choice．But a good kick can put the other team at the far end of the field，making it more difficult for that team to score．
People watching a football game are certain to shout their advice．Some will shout，"Kick the ball!"But others will urge the team to take a chance，to live dangerously．"Go for it!"they will shout．
56．"Go for it!"is an expression which comes from a sports game that PictureCshows．
57．The second paragraph（段落）mainly tell us about theCof the game．
A．teams B．fields C．rules
58．A team hasAchoices after three unsuccessful attempts．
A．two B．three C．four
59．After four attempts，if a team fails to move the ball forward ten yards，they"llBthe ball．
A．keep B．lose C．kick
60．When people shout，"Go for it!"，they hope the team chooses toB．
A．kick the ball B．try a fourth time C．give up the ball．
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