[ Tenses ]
They _____ (complete) their homework before the teacher arrived.
A. had completed
B. were completing
C. complete
Select your answer:

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TOEIC Tenses, VerbsAdverb of Frequency and Past Continuous TenseModals "Should"Have to/Has to-ing form and the to-infinitiveAdjective vs AdverbGrammar and IdiomsBasic GrammarStative Verbs and TensesGrammar - help/have/let/makeOther quiz:
Grammar › ViewWhich sentence is correct?
A. I seen him at the mall yesterday.
B. I saw him at the mall yesterday.
C. I seen him at the mall yesterday.
D. I see him at the mall yesterday.
Grammar for IELTS › View
The manager interviewed ___ candidates in turn.
A. each of the
B. each
C. every
