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【单选题】
疏果的适宜时期为A.
后到果实成熟前均可进行， 。
B.
开花即可进行， 到果实第二次迅速生长期结束。
C.
15－20天进行，至果实硬核前结束。
D.
采收前30天。
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举一反三
【单选题】—Must we clean the classroom at once? —No, you . You can clean it after school.
A.
needn’t
B.
mustn’t
C.
must
【判断题】In Australia, The federal government not only helps fund the public universities, but is involved in setting curriculum.
A.
正确
B.
错误
【单选题】-- __________?--I would like to look at some shoes.
A.
What do you want
B.
What would you like to do
C.
Can I help you
D.
Where are you going
【单选题】—Must we clean the classroom now? —No, you needn't. It _____ after school. [ ]
A.
may clean
B.
must clean
C.
need be cleaned
D.
can be cleaned
【单选题】-Must we clean the classroom now? -No, you _____. [ ]
A.
must
B.
needn't
C.
aren't
D.
must not
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