---I saw Betty to Grandpa Li's home just now.---Yes. She’s often seen _________ the old man with the housework.
#43823
A
go, help
B
going, to help
C
go, to help
D
going, helps
推荐题目
Every possible means ______ to prevent the air pollution, but the sky is still not clear.
#86302
A
is used
B
are used
C
has been used
D
have been used
My father, together with some of his old friends, _________there already.
#86105
A
havebeen
B
hasbeen
C
hadbeen
D
willbe
