[ Past Tense ]
I thought of it just when you …………………………….. your mouth.
A. was opening
B. had opened
C. opened

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Grammar - must & have toTenses and StructuresMixed TensesSo Such Enough TooAdverb Clauses of TimeWish + Verb 2Pronoun Antecedent AgreementAdjective and AdverbGrammar ElementaryCoordinating & Subordinating ConjunctionsOther quiz:
Grammar › ViewPlease keep quiet, I _ to the radio. You know I _ to the news in the mornings.
A. am listening/listen
B. listen/ am listening
C. listen/listen
D. am listening/ am listening
Present Continuous › View
Carlos_________________(talk) with his girlfriend
A. is talk
B. is talking
C. are talk
D. are talking
Tenses › ViewIf he works hard he ______________ pass.
A. shall
B. shall be
C. will be
D. will
Verb Phrases › View
____ mineral water, tea, or coffee.
A. go
B. wear
C. cook
D. drink