单项选择题 Senior citizens want a more comfortable and （）future.

单项选择题 I looked forward to the （）of their theories.

单项选择题 Our challenge is to（）those voters and inspire them to join our cause.

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.