(2014·成都市重点中学联考)She can’t help________the house because she’s busy making a cake in the kitchen.
#99136
A
to clean 
B
cleaning
C
cleaned 
D
being cleaning
推荐题目
Jack doesn’t smoke now, but he ______________ for almost twenty years.
#101839
A
was smoking
B
smoked
C
has smoked
D
had smoked
I don't know when he ___. But when he ___ back, I’ll let you know.
#103935
A
comes ; will come
B
will come; comes
C
comes;comes
D
will come; will come