----I’m sorry, but there is no smoking on this flight.----Oh, I _____ that. Sorry, I won’t again.
#104849
A
don’t know
B
didn’t know
C
won’t know
D
haven’t known
推荐题目
-Why does the Lake smell terrible? -Because large quantities of water       .  
#104968
A
have polluted
B
is being polluted
C
has been polluted
D
have been polluted
-Why does the Lake smell terrible?-Because large quantities of water__________. 
#104945
A
have polluted
B
is being polluted
C
has been polluted
D
have been polluted
The church tower which_________will be open to tourists soon. The work is almost finished.
#103744
A
has restored
B
has been restored
C
is restoring
D
is being restored