—Shall we go out for a swim?—Sorry, I can’t. I ______ housework for my mother now.
#42129
A
am doing
B
is doing
C
are doing
D
did
推荐题目
It’s ten o’clock. Betty _______ piano.
#42454
A
is playing
B
plays
C
is playing the
D
plays the
Robots         the house for us in the future.
#41540
A
clean
B
cleaned
C
will clean
D
/
While I _______ down the street, I _______ my classmates.
#41817
A
was walking; met
B
walked; met
C
was walking; was meeting
D
walked; was meeting