It is reported that the scientists in our country are_______all possible way to control H7N9 flu. 
#12027
A
operating
B
solving
C
exploding
D
exploring
推荐题目
It was very kind of you to do the washing-up, but you _____ it.
#13892
A
needn’t do
B
shouldn’t do
C
mustn’t have done
D
needn’t have done
This book ____ 12 units, _____ the unit of Music. 
#12997
A
contains. Including
B
includes; containing
C
contains, includes
D
including; contains