—How clean the room is!   —Yes,I am sure that someone _______ it.
#36374
A
cleans
B
cleaned
C
has cleaned
D
had cleaned
推荐题目
----------Do you know the _________about the writer? ----------Yes, he has _________for 2years.
#38189
A
die; died
B
death; died
C
die; been dead
D
death; been dead
–Will the twins go to Tom’s birthday party next Sunday? --Not until they ________.
#41610
A
will invite
B
invite
C
will be invited
D
are invited
It’s said that he started his own firm when he was only 24. 
#42478
A
built
B
established
C
invented
D
created.
The mobile phone has influenced people’s life a lot since it ______.
#36450
A
invents
B
invented
C
is invented
D
was invented