Bad habits, _______ formed, are difficult, and sometimes impossible to shake off.
#31345
A
before
B
once
C
until
D
unless
推荐题目
The patient's son asked the doctor the question________his father could survive the big operation.
#32129
A
whether
B
if
C
that
D
what
It is considered unwise to give a child _______ he or she wants.
#33105
A
however
B
whatever
C
whichever
D
whenever
Sally worked late in the evening to finish her report _______ her boss could read it first next morning.
#34345
A
so that
B
because
C
before
D
now that
______ I met him, I always think of the thing that happened between us.
#30127
A
Every time
B
The moment
C
Suddenly
D
While
---Tom hurt his left leg in the game this morning.---Really? It would take at least two weeks ______ he could recover and return to school.
#34446
A
when
B
that
C
since
D
before