A．To find out exactly what happens．
B．To save fuel．
C．To fly even more slowly．
D．To keep balance．

A．People Who lose directions in present jobs．
B．People Who are ready to change their jobs．
C．People Who are never satisfied with their jobs．
D．People Who have never worked before．

A．Our dreams are useless if we fail the exams．
B．School and courses act as tools to achieve our goal and dream．
C．The Whole education procedure is not perfect,
D．We have too little time to make plans for dreams．