This problem may lead to more serious ones if ______ unsolved.
#67907
A
making
B
remained
C
keeping
D
left
推荐题目
 While watching television, ________.    
#68458
A
the doorbell rang
B
the doorbell was rung
C
we heard the doorbell ring
D
we heard the doorbell rings
. Could ______ be in the restaurant ______ you lost your handbag?
#70202
A
it; which
B
it; that
C
that; that
D
that; where
 You can do it ______ you like; it really doesn’t matter.
#71845
A
whatever
B
however
C
whoever
D
whichever