----Where is your sister?  -----She _________ my mom with cooking. 
#41584
A
is helping
B
helping
C
is help
D
helps
推荐题目
 The big fire_____ out quickly two weeks ago.
#36605
A
was put
B
is put
C
put
D
puts
By the end of the last match, they _________ two goals.
#36334
A
kicked
B
had kicked
C
have kicked
D
were kicking
—What did Lucy say? —She said she _______ Hangzhou the next year.
#41833
A
would visit
B
will visit
C
visited
D
is visiting
By the time I got to the cinema,the movie _______ for ten minutes.
#42286
A
had begun
B
had been on
C
has started
D
has been on