Clean water and fresh air are essential for our daily life, _______ we can’t live.
#66990
A
by which
B
without which
C
that
D
on which
推荐题目
I’ll go to America to strengthen my English_______ it isn’t too expensive.
#72064
A
except
B
provided
C
assumed
D
unless
While __________ for the bus, I happened to come across my childhood friend, Tom.
#68214
A
waited
B
wait
C
waiting
D
to wait
It is not immediately clear _______ the financial crisis will soon be over.
#71860
A
since
B
what
C
when
D
whether
travel can broaden your mind , I don’t think it’s a good idea to spend too much time and money on it .
#68398
A
If
B
While
C
Because
D
As