—The window is dirty.—I know. It ______ for weeks.
#102943
A
hasn’t cleaned
B
didn’t clean
C
wasn’t cleaned
D
hasn’t been cleaned
推荐题目
We have 24 offices, each ____computers.
#103675
A
is equipped with
B
equipped by
C
is equipped by
D
equipped with
This year the price of rice _____ about twenty percent. 
#101072
A
was raised
B
has been risen for
C
has risen by
D
has raised to
—When shall we restart our business ?—Not until we        our plan .
#103044
A
will finish
B
are finishing
C
are to finish
D
have finished