——Who watered the flowers beside the window? ——Helen ____________.
#39452
A
Did
B
Do
C
did
D
does
推荐题目
My aunt left her office after she __________ her work. 
#37970
A
had finished
B
finishes
C
has finished
D
was finished
What         you         at this time yesterday?
#41896
A
do, do
B
have, done
C
were, doing
D
are, doing
 There      serious air pollution if people use more and more cars.
#36558
A
has
B
will be
C
will have
D
are going to be
---Pardon? I _____ quite catch you.--- I said I ______ the song before. 
#39608
A
didn’t, hadn’t heard
B
don’t, didn’t hear
C
didn’t, didn’t hear
D
won’t, hadn’t heard