Our challenge is to（）those voters and inspire them to join our cause.

Forests provides （）materials for human activities.A.cru...

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

Retailers will need to rethink their strategies as（）sho...

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

The National Institute of Health is discussing ways of ...

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