Every possible means ________, but the teacher as well as the students ________ found a solution to the problem yet.
#102485
A
has been tried; hasn’t
B
has tried; haven’t
C
have tried; haven’t
D
have been tried; hasn’t
推荐题目
The past two years ________ a sharp rise in oil price，which adds to the burden of auto transportation industry.
#99722
A
witnessed
B
has witnessed
C
is witnessing
D
witnesses
The plant is dead. I ______it more water.
#103477
A
will give
B
would have been
C
must give
D
should have given
Either the driver killed in the car or the lucky passenger questioned by the police ______ them very puzzled how this accident has happened.
#102702
A
make
B
makes
C
was making
D
were making
Although she is pretending hard to be young, grey hair and the lines on her face _______.
#100643
A
give her away
B
pick her up
C
take her away
D
hold her up
The stone bridge __ _ last year is very beautiful.
#101880
A
built
B
was built
C
being built
D
to be built