16．A group of boys gathered around a tree． "What a tall tree!" they said to each other． "It would be （1）
to climb to the top!"
The group of boys then decided to play a game to see who could climb to the top of the tree（2）
．Their mothers were sitting not far away，looking on at their children as they （3）
．
One of the climbers was an 8-year-old boy named David．He was the shortest child in the group．Nobody thought he would（4）
the competition．
Then the game started．All of the boys tried their best to climb as（5）
as they could．Although they all made it halfway up the tree before David did，he reached the top of the tree fastest（6）
．
His mother was proud to see this．She asked him， "David，how did you （7）
to reach the top of the tree so quickly？"
"It was easy，" David said． "The other children kept looking down as they climbed．When they realized how high they were，they got scared（恐懼的） and were afraid of（8）
down．I，however，looked only （9）
．When I saw how close I was，I kept going higher and higher until I reached the top．"
It is true in life that if we just keep going forward without looking back，we are more likely to reach our goals（目標(biāo)）．
| （1） |
A．useful |
B．possible |
C．crazy |
D．exciting |
| （2） |
A．last |
B．finally |
C．first |
D．really |
| （3） |
A．studied |
B．played |
C．jumped |
D．discussed |
| （4） |
A．win |
B．enter |
C．like |
D．hold |
| （5） |
A．well |
B．safely |
C．carefully |
D．high |
| （6） |
A．a(chǎn)s well |
B．in the end |
C．a(chǎn)s usual |
D．in time |
| （7） |
A．manage |
B．hope |
C．imagine |
D．a(chǎn)gree |
| （8） |
A．looking |
B．climbing |
C．falling |
D．going |
| （9） |
A．down |
B．over |
C．out |
D．up |
