[ Relative Pronoun ]
The software … maker was unknown was used by many retailers.
- that
- whom
- whose

Random Topics:
To Infinitive/Bare Infinitive/GerundsVerb Tenses and Past ParticiplesGrammar & VocabGerund & ParticipleInfinitives or GerundsComparative - SuperlativeTimeSimple Future - WillConditionalsPresent Perfect or Past Simple TenseOther quiz:
Prepositions › Viewborrow … smb
A. with
B. from
C. of
D. by
Idioms › View
What he said goes ___ his principles.
a. against
b. off
c. ahead
She asked me where I _______ from.
A. come
B. coming
C. to come
D. came
Grammar › View
How are adjectival clauses introduced?
A. By coordinating conjunctions
B. By prepositions
C. By subordinating conjunctions
D. By relative pronouns or relative adverbs
