-- Lisa was seen ______ an old man go across the street this morning. --What a kind girl she is! 
#44478
A
helping
B
helped
C
to help
D
helps
推荐题目
I think students______ to do homework with friends.
#44694
A
is allowed
B
are allowed
C
should allowed
D
should be allowed
Now computers _________ all over the world .
#44607
A
is used
B
are using
C
are used
D
have use
 Finally, the child was made _______ and began to smile. 
#44368
A
stop crying
B
to stop to cry
C
to stop crying
D
stop to cry