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1) Fill in the blanks with the words:

DIFFERENT- DIFFERENCE
a) What is the _____________ netweem ozone and oxygen?
b) There are _____________ gases in the atmosphere.

IMPORTANT- IMPORTANCE
a) Technology is _______________ in modern world.
b) We know the _____________ of the greenhouse effect.

INTELLIGENT-INTELLIGENCE
a)This is an ______________ solution for pollution.
b) _____________ makes men different from other animals.

IGNORANT-IGNORANCE
a) She is completely_______________.
b) _______________ eliminates opportunities.

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