[ Vocabulary ]
What does the word ‘propulsion’ mean?
A. The curve or path of a moving object
B. To scurry; to move in a short, hurried run
C. To ask or demand
D. The act of moving forward

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Prepositions of Time › ViewHistory is the study of events that occurred __ the past.
A. in
B. on
C. at
D. of
Grammar › View
What _____ you do after school yesterday?
A. do
B. did
C. does
D. doing
Grammar › ViewFirst, I …. the fish and then I … the eggs.
A. fried, boiled
B. fried, was boiling
Yes-No Question › View
They were so naughty.
- Did they so naughty?
- Were they so naughty.
