1.…has been diverted in an ill-considered irrigation scheme to grow cotton in the desert.

A. turn down
B. turn
C. move or strike gently
D. switch on

.…a small reduction in one country’s emissions had changed the amount of pollution found in the remotest end least accessible place on earth.

A. flexible
B. executed
C. approachable
D. executable

.…in a small tent pitched on a twelve-toot-thick slab of ice floating in the frigid Arctic Ocean.

A. freezing
B. noctilucent
C. torrid
D. scorching

过去，我们对这个问题的认识比较肤浅、简单。In the past, our understanding of this issue was quite _____ and _______.

他们有正当的理由拒绝这份工作。They have ______ reasons in rejecting the job.