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C) Answer the following

6) Fill in the blanks by choosing the appropriate words from the box.

explosives gravity telephone inventor forces

a) One day, Isaac Newton wondered about the _________________ of nature.

b) Isaac Newton discovered the force of _________________.

c) Albert was deeply interested in developing _________________.

d) Thomas Alva Edison was another great _________________.

e) Alexander Graham Bell invented the _________________ in 1876.

P R Vocabulary
Q

Idioms

Idioms are word combinations or phrases that mean something different from the
literal meanings of the phrases. Two features identify an idiom. First, we cannot
understand the meaning of the idiom from the individual words. Second, both the
grammar and the vocabulary of the idiom are fixed. If we change them, we lose the
meaning of the idiom.

Examples:

Idiom Meaning

draw a blank cannot remember

have a change of heart change one’s mind

be second to none be the best

get your act together behave properly

7) Choose the correct meaning of the underlined idioms.

a) When Sonia won the Best Student of the Year award, Megha was [ ]
green with envy.

A) fell sick
B) painted her face green

C) was jealous

Scientists and Inventors Who Changed the World 129

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