—How often do I need to feed the fish?-They      food every day, or they will be hungry.
#44530
A
must give
B
mustn’t give
C
mustn’t be give.
D
must be given
推荐题目
Now computers _________ all over the world .
#44607
A
is used
B
are using
C
are used
D
have use
Many accidents_____ by careless drivers last year. 
#44673
A
are caused
B
were caused
C
have caused
D
will cause
Most Japanese are greatly ___________ by the earthquake.
#45037
A
affected
B
effort
C
influence
D
effected