---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
推荐题目
It is true that knowledge_____ rather than being taught.
#44980
A
learns
B
learned
C
is learned
D
was learned
An official _____ by some reporters on food problems in Shanghai yesterday.
#44962
A
is interviewing
B
is interviewed
C
was interviewing
D
was interviewed
There was a big earthquake in Japan, but luckily many people _________.
#45002
A
save
B
saved
C
are saved
D
were saved