____some doubt among scientists about the cause of cancer.
#92930
A
It exists
B
There exists
C
There is existing
D
It is existing
推荐题目
What a bargain! The price of this dress is_______ that of the skirt.
#91978
A
half not as much as
B
much not as half as
C
not half as much as
D
as much as not half
It was the second time that the show__________in the good place.
#93137
A
was
B
has been
C
had been
D
am
_____, we need to imporve the equipment in our factory.
#94888
A
As it is
B
As it was
C
As it were
D
As it will be
The driver drove _______ hit at a big tree and the car came to s stop.
#94756
A
too carelessly to
B
carelessly enough to
C
so carelessly that he
D
so careless that he
It was from May 1 to October 31,2010____________the World Expo 2010 Shanghai will be held, _____________is a great event for the Chinese people.
#94632
A
when; that
B
that; when
C
which; when
D
that; which