—What a nice classroom! —It _____ every day.
#44598
A
is cleaning
B
has cleaned
C
must clean
D
is cleaned
推荐题目
---How often do I need to feed the birds?---They______ food every day, or they will be hungry.
#44408
A
must give
B
mustn’t give
C
must be given
D
mustn’t be given
 The 30th London Olympic Games ____________ on July 27th, 2012.
#44703
A
will be held
B
is held
C
was held    
D
has been held
Computers ________widely in our daily life.
#44976
A
use
B
used
C
were used
D
are used