Every possible means_____ been tried,and we find only______ this means can we do it well.
#86084
A
have,in
B
have,by
C
has,in
D
has,by
推荐题目
Grammar mistakes of this kind _____ widely among Chinese students. 
#85807
A
have been made
B
has been made
C
have made
D
has made
A lot of people as well as the president of the animal protection association ____________ experiments on animals.
#85721
A
are opposed to do
B
oppose to doing
C
is opposed to doing
D
oppose doing
________ his brothers.
#44004
A
This is
B
That’s
C
These are
D
That’s isn’t