—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
Look! The boys _______ football on the playground.  
#42331
A
plays
B
play
C
are playing
D
played
Mr. Black isn’t here. He ________ to Chongqing.
#40458
A
went
B
have gone
C
has been
D
has gone
It        when I        my homework last night.
#40154
A
raining, did
B
rained, was doing
C
was raining, do
D
rains, was doing