装药时要求1个炮眼内不得装（）起爆药卷。
A.2个
B.3个
C.4个
参考答案：A
_____ cleaning the doghouse was the last thing I wanted to do, I did it with all my efforts.
A．Although
B．As
C．As long as
D．Now that
A．2k
B．2k-1-1
C．2k-1-1
D．2k+1-1
