While Helen ________ the piano，her mother came in．
#39922
A
was playing
B
is playing
C
played
D
plays
推荐题目
-- I called you this morning, but nobody answered.-- Sorry. I ________ the flowers in the garden.
#39742
A
am watering
B
was watering
C
water
D
watered
—What were you doing when the earth quake happened in Jilin?—I________TV when I heard the news.
#38581
A
was watching
B
watch
C
am watching
D
were watching
-What are you going to do this Sunday? -I ________ yet.
#40050
A
won't decide
B
didn't decide
C
haven't decided
D
don't decide
Our English teacher is very nice. We _____ friends since three years ago.
#41622
A
were
B
became
C
have been
D
have made
—Shall we go out for a walk?—Sorry, I can’t. I _______ my homework.
#42706
A
do
B
did
C
am doing
D
was doing