We all know that paper burns in  _________ .
#34913
A
CO2
B
N2
C
O2
D
CO
推荐题目
The black horse is___________ of the pair.
#20790
A
the strongest
B
the stronger
C
the strong
D
quite strong
From his________expression on his face,we can see that he was very________at his driving test result.
#17690
A
disappointed;disappointed
B
disappointed;disappointing
C
disappointing;disappointed
D
disappointing;disappointing