—What were you doing at this time yesterday? —I ______ on the grass and playing with Tony. 
#38003
A
sit
B
sat
C
am sitting
D
was sitting
推荐题目
If it ________ this Saturday, we will ________ for a picnic.
#42022
A
won’t rain; shall go
B
doesn’t rain; will go
C
isn’t rain; go
D
doesn’t rain; go
 What ____ she ____ on weekends? 
#38643
A
is, do
B
does, does
C
do, do
D
does, do
The physics teacher said that light _______ much faster than sound.
#39237
A
travels
B
traveled
C
to travel
D
was travelling
He _____ a song last night.
#41614
A
writes
B
writing
C
wrote
D
writed