The question _______ we can get enough coal for the winter has not been cleared up yet .
#33883
A
that
B
if
C
which
D
whether
推荐题目
________they visited the Science Museum，they showed great interest in everything they saw.
#30703
A
The first time
B
For the first time
C
At first
D
At the first time
This approach, ______ more expensive than the basic one, provides us with considerably more usage flexibility.
#31500
A
as
B
since
C
while
D
if
I doubt ____________all the people invited will come to attend the ceremony in such bad weather.
#31696
A
whether
B
that
C
how
D
what
The settlement is home to nearly 1,000 people, many of __ left their village homes for a better life in the city.
#34731
A
whom
B
which
C
them
D
those
I have a tight budget for the trip，so I'm not going to fly ________ the airlines lower ticket prices.(2012·上海，32)
#30443
A
once
B
if
C
after
D
unless