It just isn't fair ________ I was working as a cleaner last month; my friends were on a visit to Dalian.( 2012·湖北八校联考)

A．whenever

B．though

C．for

D．while

生物与环境的关系是（　　）

A．生物适应环境

B．生物的分布受环境制约

C．环境对生物无影响

D．生物在适应环境及影响环境的同时，环境也在影响着生物