Wrens didn't flee from unfamiliar sounds. But after training, they usually---------- so.
did
The sites ---------- from single hamlets to large villages.
covered
ranged
lined
graded
Researchers --------- satellite images and identified 81 ancient sites.
scoured
peered
sought
probed
It is believed European diseases arrived in the area ,even before Europeans ever ------- foot in the area.
put
stepped
left
set
This is a useful skill, given ----- hard it can be to see predators.
how
An obsession with achieving goals is a common--------- of life in many parts of the world.
character
matter
point
feature
These accounts were subsequently --------------- as fantasies.
Denied
Dismissed
Declined
Dispelled
Birds listen to the alarm calls of other species ,---------- it possible for them to take advantage.
making
Birds can learn unfamiliar calls,----------- the bird that made that call even being visible.
without
Individual birds learn from each other --------- than through direct experience.
Rather
There are many eyes looking out ------- danger.
for
The discoveries have added ---------- to the idea the population of the Amazon were much greater than once thought.
force
size
weight
charge
Deforestation has helped reveal evidence, mainly in the ---------- of earthworks.
Form
Feature
Pattern
Model
Birds learn life skills in various ways. .....some of what they know is innate, some is acquired.
While
In one recent study in a ---------- remote region of the Amazon,....
practically
virtually
relatively
roughly
The first Europeans to travel to the Amazon region ------------ seeing widespread settlements.
announced
informed
reported
notified
Such a narrow focus can ------ to problems.
result
lead
cause
trigger
----- the absence of predators, birds can be trained to call for help.
In
The research team also came --------- fragments of ceramics.
about
through
over
across
People are encouraged to ------- goals and then strive to achieve them.
fit
mark
lay
set