The Greens walked ________ the door just now. 
#50918
A
over
B
at
C
on
D
through
推荐题目
–What would you like to drink?--I like tea ____ milk in it.
#48223
A
hasn't
B
with
C
there isn't
D
has
 They can buy the pens _____ a very good _____.
#51047
A
at, price
B
in, price
C
at, cost
D
at, selling