That piece of music sounds quite familiar. Who _____ the piano upstairs?
#102640
A
as played
B
played
C
plays
D
is playing
推荐题目
I’ve won a holiday for two days to Florida. I ______ my mum.
#104394
A
am taking
B
have taken
C
take
D
will have taken
 —Is there anything wrong, Bob? You look sad.—Oh, nothing much. In fact, I __________ of my friends back home. 
#104607
A
have just thought
B
was just thinking
C
would just think
D
will just be thinking
If law and order as well as rules and regulations ______, neither the citizen nor his property is safe.
#100783
A
are not observed
B
is not observed
C
were not observed
D
was not observed