the writer has been used to sl( )in the daytime and working at night
问题描述：
the writer has been used to sl( )in the daytime and working at night
答
sleeping，
be used to
1)如后跟动词原形，表式"被用于",用于被动语态度中，
2)跟V+ing.表习惯于，
这个地方采用第二种，即习惯于，这个作者习惯与白天睡觉晚上写作，sleeping和working处于相同的地位
答
sleep\7
sleeping