[ Grammar ]
PAST TENSE IRREGULAR VERB: They shake hands. Yesterday, they ____ hands.
A. shake
B. shook
C. shoken
D. shocked

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Articles › View_____ internet is a valuable resource for research.
A. A
B. An
C. The
D. no article
Grammar › View
Her ________ are very clean and white.
A. tooths
B. teeth
C. teeths