—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
---_____they have a car?     ----Yes, they _______.
#38663
A
Do, are
B
Are, do
C
Do, do
D
Are, are
 Listen! My sister_______ the piano in her room.
#39812
A
play
B
is playing
C
plays
D
Playing
  By the time I was nine ,I ______hundreds of English words.
#38204
A
had learned
B
have learned
C
has been learned
D
had been learned