We students should treasure the short senior school’s study life of three years. Once ________, the opportunity can’t get back.
#80710
A
losing
B
was lost
C
lost
D
being lost
推荐题目
 Not until then _____ their marriage was breaking up because they had little in common.
#83081
A
did I realize
B
I realized
C
had I realize
D
has I realized
Small sailboats can easily turn over in the water ________.
#82117
A
if not managed carefully
B
if are not managed carefully
C
unless not managed carefully
D
unless are not managed carefully
Between the two windows       was taken 10 years ago.
#79643
A
a picture hangs that
B
a picture hanging which
C
does a picture hang which
D
hangs a picture that