Bad habits, _______ formed, are difficult, and sometimes impossible to shake off.
#31345
A
before
B
once
C
until
D
unless
推荐题目
Try to read stories in English and speak in English whenever you can，________ you will see more progress over time.
#30477
A
but
B
or
C
and
D
so
—Why do you look worried?— Because what I am really concerned about is _____my friend can do me a favor or not..
#32847
A
although
B
whether
C
when
D
where
It was during World War II, ____ he was in his early twenties, _____ he joined the British Army.
#33800
A
that; when
B
when; that
C
when; when
D
that; that
A survey was carried out on the sleep time of students in middle schools, ______ were surprising.
#33316
A
its results
B
whose result
C
the results of which
D
of which results