There __________ some children in the painting room. They are studying painting. 
#41591
A
is
B
are
C
am
D
was
推荐题目
Xiao Li _________ his hometown for ten years.
#42434
A
has left
B
1eft
C
has been away from
D
went away from
When the teacher came in, all of us _______.
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A
stopped talking
B
stopped to talk
C
stop talking
D
stop to talk
This company       since five years ago.
#36945
A
opened
B
has opene
C
has been open
D
has been opened