[ Grammar ]
Last night I ______ an email when my friend Tom ________ me.
A. Last night I wrote an email when my friend Tom called me.
B. Last night I was writing an email when my friend Tom was calling me.
C. Last night I wrote an email when my friend Tom was calling me.
D. Last night I was writing an email when my friend Tom called me.

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PronounInfinitive FormsPrepositions of Location, Movement and TimeGerundsPassive and Active SentencesTo Infinitive/Bare Infinitive/GerundsPresent Simple and Continuous TensePast SimpleSynonymWas and WereOther quiz:
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