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【单选题】
（）不适宜采用退火工艺。A.
高碳钢
B.
形状复杂的零件
C.
低碳钢
D.
切削性能较高的零件
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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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