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Choose the sentence with the correct subject-verb agreement.

A. He ate breakfast every morning.

B. He eating breakfast every morning.

C. He eats breakfast every morning.

D. He eat breakfast every morning.

These curtains are so dirty. They must ____ .

A. be cleaned

B. clean

C. cleaned

a group of two or more atoms that form the smallest identifiable unit through chemical bonds

A. atom

B. element

C. compound

D. molecule

Our class ……………X B

A. is

B. are

C. am

D. none