— When _________ you________ your teeth, Billy?—Just now.
#42507
A
do; brush
B
have; brushed
C
did; brush
D
was: brushing
推荐题目
The train _______. Please get ready to get off.
#42532
A
arrives
B
arrived
C
is arriving
D
to arrive
I _____ the newspaper while my mother _____ TV plays yesterday evening.
#39917
A
was reading; was watching
B
was reading; watched
C
read; was watching
D
read; would watch
It’s said that he started his own firm when he was only 24. 
#42478
A
built
B
established
C
invented
D
created.