---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
—Can I get my ears pierced, Mom? —No. As a student, you ________ do that.
#44593
A
are allowed to
B
should be allowed to
C
may not
D
shouldn’t be allowed to
Every year lots of trees _______ to make our country more beautiful.
#45056
A
is planted
B
was planted
C
are planted
D
were planted
To my parents’ joy, my elder brother ____ a job in this factory yesterday.
#44477
A
offered
B
offers
C
is offered
D
was offered
The teacher, as well as his students_______ to attend the party last week.
#44856
A
is invited
B
are invited
C
was invited
D
were invited
The man is very ill and he has _______.
#44621
A
operate on
B
to be operated on
C
to operate
D
being operated on