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 › ViewWhich word below is a noun?
A. beautiful
B. sour
C. dog
D. sunny
Grammar › View
Tatiana asked: “What do you think?” This question in Reported Speech is…
A. Tatiana asked what did I think.
B. Tatiana asked what I did think.
C. Tatiana asked what I think.
D. Tatiana asked what I thought.
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.