单项选择题 Forests provides （）materials for human activities.

单项选择题 Retailers will need to rethink their strategies as（）shoppers demand price-competitive goods.

单项选择题 The National Institute of Health is discussing ways of tackling the problem of childhood（）.

单项选择题 To （）how the system works，Bruce shows off the prototype of a 3D analysis tool.

单项选择题 We’re firmly（）to the manager’s latest decision to expand overseas market.