He was driving to work. (long duration) He called me. (short duration)
A. When he called me, he was driving to work.
B. While he called me, he was driving to work.
C. While he was calling me, he was driving to work.

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Verb Patterns / IngModals and InversionCoordinate ConjunctionConjunctions - Conjunctive AdverbsCardiology ServicesTOEFLWho vs WhomCompliment, Congratulation, and HopeFuture Perfect TenseElectricity VocabularyOther quiz:
Grammar › ViewThe ex-convict could feel ______ people behind him were exchanging looks of fear and ______ his arrival would soon become the talk of the town.
A. that; that
B. if; if
C. whether; whether
D. about; then
Conjunctions, Prepositions and Interjections › View
Which conjunction should complete this sentence? “I want to buy a new car, __ I don’t have enough money.”
A. or
B. but
C. and
D. because
Idioms › View“Out of order” means it ___.
a. is untidy
b. doesn’t work
c. is unavailable
Reported Speech › View
“I need to get a loan to buy a car.”
A. He said he needed to get a loan to buy a car.
B. He said he will need to get a loan to buy a car.
C. He said he would need to get a loan to buy a car.
D. He said he had needed to get a loan to buy a car.