Scientific research has revealed that
throughout the animal world, communication is just as important as it is to
human beings. Countless animals lack the{{U}} (67) {{/U}}for human
speech, yet they employ entirely different methods in order to communicate{{U}}
(68) {{/U}}each other. Some of the most dramatic examples of this are
provided by birds. There arc roughly 10000{{U}} (69) {{/U}}of birds in
the world, each of which has its own miraculous features. {{U}} (70)
{{/U}}you may live, you can see a great number of these feathered creatures
and can{{U}} (71) {{/U}}different and extraordinary properties. In
addition to their flawless flight mechanisms, expertise{{U}} (72)
{{/U}}the routes and timing of migrations, and ability to build nests, their
methods to communicate is{{U}} (73) {{/U}}wonder. At critical times in
birds’ lives, the
A. Wherever
B. If
C. As
D. When
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Scientific research has revealed that
throughout the animal world, communication is just as important as it is to
human beings. Countless animals lack the{{U}} (67) {{/U}}for human
speech, yet they employ entirely different methods in order to communicate{{U}}
(68) {{/U}}each other. Some of the most dramatic examples of this are
provided by birds. There arc roughly 10000{{U}} (69) {{/U}}of birds in
the world, each of which has its own miraculous features. {{U}} (70)
{{/U}}you may live, you can see a great number of these feathered creatures
and can{{U}} (71) {{/U}}different and extraordinary properties. In
addition to their flawless flight mechanisms, expertise{{U}} (72)
{{/U}}the routes and timing of migrations, and ability to build nests, their
methods to communicate is{{U}} (73) {{/U}}wonder. At critical times in
birds’ lives, the
A. simplicity
B. curiosity
C. capacity
D. ability
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