I... on the ice while I was crossing the street ...

★ Simple Past & Past Progressive

I… on the ice while I was crossing the street in front of the dorm.

A. was slipped

B. slipping

C. had slipped

D. slipped

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What is the meaning of “ace” in the following sentence?

“I was up all night studying, but it was worth it – I aced my chemistry final.”

A. to do very well in an exam

B. to do very badly in an exam

C. to score low

D. to fail