[ Grammar ]
I do not remember any customer ever ____________ about our service.
A. complain
B. complaining
C. complained
D. to complain

Random Topics:
Clauses of ReasonUnreal ConditionalsPast Simple & Past PerfectArticles & PrepositionVerbs - third personPre-intermediateConditional Sentence Type 0-3Infinitive and GerundConditionals and Modal VerbsMixed TensesOther quiz:
Grammar › ViewIf my mother goes home late this evening, my father ___________.
A. will cook
B. would cook
C. had cooked
D. has cooked
Vocabulary › View
More than one noun.
A. Regular
B. Irregular
C. Plural
D. Sentence
