Tutorial World Primary 5
Name:_________________________ Date:_______________

Cloze Passage (4.6)

Read the passage carefully and fill in the blanks with the most suitable word.


Apart ______________ their usual sense organs, animals often

develop special sense organs. These ___________ give them extra

sensitivity and information about the ___________ around them and

are often needed for survival.

Dogs have the most amazing sense of ____________. Inside a

dog's muzzle, there is a large space that _____________ scents and

passes the sensory information to the ___________. Moisture inside

the nose ______ to dissolve scent particles, this enhances detection

of the smell. Interpreting scents takes up a large ____________ of a

dog's brain activities.

Snakes have an organ at the roof of their mouths ___________

the Jacobson's organ. A snake collects chemical particles ________

its tongue and transfers them to sensory _________________ in the

Jacobson's organ for the chemicals to be detected.

Human beings do not develop extra sense organs. Often when

one of the senses is _____________, the other senses can become

more sensitive to overcome deficiencies.


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