China moved to ()its grain production when its grain output had kept declining for five consecutive years.

单项选择题Iran has expanded its uranium enrichment activities () UN demands to scrap its nuclear-related programs.

A. in defiance of
B. in line with
C. in return for
D. in relation to

单项选择题Two dozen New Yorkers stood on the platform at the subway station,() briefcases and newspapers.

A. clipping
B. clutching
C. clashing
D. clarifying