The young trees should______ as often as possible.
#44714
A
take care of
B
be take care of
C
be taken care of
D
be taken care
推荐题目
--When _____ the abacus _____? -- In the sixth century by the Chinese people.
#44867
A
is, invented
B
did, invent
C
was, invented
D
does, invent
Food safety is important. Rules _____ to stop people from food pollution.
#44569
A
must make
B
must be made
C
mustn’t make
D
mustn’t be made
— Did the doctors save the old man？— Yes. He _______ on the morning of May 10th. And now he is out of danger.
#44423
A
was operated
B
operated
C
operated
D
was operated
Neither Jam nor his parents _______ places of interest here since they came to China.
#44627
A
will visit
B
has visited
C
have visited
D
visited
An official ___________ by some reporters on food problems in Shanghai yesterday.
#44852
A
is interviewing
B
is interviewed
C
was interviewing
D
was interviewed