If their habitat___________(受到了威胁) or they cannot find enough food, their numbers __________(就会减少)

There has been a steady _________(decrease) in population in this city.

Winter is the best time for ________(hunt) in mountain areas.

Many parents feel a sense of ________ (lose) when their children leave home.

They are pulling their troops out of the battle z________.

He still _________ (保留)his opinion on some points.

There were some photos of ________(野生动植物)in the document.

这体现了野生动植物保护的重要性，不过，我还是想按照世界野生生物基金会的建议来帮助你们。

________________________________________________,but ______________________________ the WWF __________________.

戴茜如释重负，突然笑了起来。

_________________________________________________________________.

这种剪刀是用来剪羊毛的。

This kind of scissors ____________________________ .