Children may get into some bad habits__________they lack sell-discipline.A．whenB．unlessC．thoughD．until
Children may get into some bad habits__________they lack sell-discipline.
A．when
B．unless
C．though
D．until
B．unless
C．though
D．until
参考解析
解析：考查连词辨析。因前后句是条件关系，故空缺处应填的是表示条件的连阋，though表示让步，until表示时间，故排除C和D。当unless作为连词时表示“除非，如果不”，含有否定意义，相当于if条件状语从句的否定形式，unless=if…not。这里when相当于if，引导条件状语从句。旬意为“孩子们如果缺乏自律性．他们可能会养成一些坏习惯”。故选A。
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