CÂU 21 LAST SUNDAY, BOB DECIDED TO CALL IT A DAY

Câu

21

Last Sunday, Bob decided to call it a day? means

What is it?

a. It is a tiny basic building block of matter.

a. Bob gave the previous Sunday a name

b. Bob stopped working to relax

b. All the materials on Earth are composed of various

c. Bob was absent from work that day

combinations of them .

d. Bob played truant that day

c. They are the smallest particles of a chemical element that

still exhibit all the chemical properties unique to that element.

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