问题描述：
1.may i have a look at your letter?
no,you___ a can’t b mustn’t 2.all the students in our class have different ____(able) 3.what can i do ___(help) my pet dog play games?
no,you___ a can’t b mustn’t 2.all the students in our class have different ____(able) 3.what can i do ___(help) my pet dog play games?
问题解答：
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