— The room is dirty. — I know. It ______ for several weeks.
#101322
A
hasn’t cleaned
B
didn’t clean
C
wasn’t cleaned
D
hasn’t been cleaned
推荐题目
Nelson Mandela__________ peacefully at his Johannesburg home on Thursday，President Jacob Zuma said.
#99626
A
dies
B
died
C
has died
D
had died
By the time our teacher arrives tomorrow,all the work _____,with which he will be satisfied.
#101348
A
is accomplished
B
will have been accomplished
C
will be accomplished
D
has been accompished
I have to go to work by taxi because my car _____ at the garage.
#100925
A
will be repaired
B
is repaired
C
is being repaired
D
has been repaired
I was out of town at that time, so I don’t know exactly how it ______.
#101769
A
was happening
B
happened
C
has happened
D
happens
—Hey! What's the rush?—The plane ________ at 4∶00 and I need to see my uncle off.
#101263
A
takes off
B
will take off
C
has taken off
D
took off