The problem should be handled very carefully to balance the needs of people with __________ of nature.
If people keep polluting the rivers, no fish there will survive ___.
____ the weather, the athletic meetings will be held on time.
The ground is slippery. Hold onto the rope and don’t ____.
The week-long rainfall has ___ landslides and flooding in the mountain areas.
Many scholars and experts from all over the world will be invited to attend this yearly ___ on drug control.