[ Indefinite Pronouns ]
No one knew how to open the door.
A. correct
B. not correct

Random Topics:
Opinion / AgreementPast form of ModalsAdjectives-Comparison, SuperlativePresent / Future / Present Progressive / non Action VerbsPronounciation and GrammarConjunctions & Cohesive DevicesTOEIC Grammar and Vocabulary ReviewAsking for and Giving OpinionTenses and QuestionsAdverb & Compound SentencesOther quiz:
Phrasal Verbs › ViewJim (phoning his friend Roger): Hello, Roger. I’ve been trying to _____ to you for hours!
Roger: Sorry, Jim. I had to make a lot of calls this morning.
A. put through
B. get through
C. go through
D. hold through
Quantifiers › View
I have ________________good friends. I’m not lonely.
A. a few
B. few
C. little
D. a little
Grammar › ViewAhmad usually adds ………… sugar to his tea.
A. a few
B. a little
C. many
Vocabulary › View
What is a synonym for the word “entranced”?
A. Captivated
B. Bored
C. Annoyed
D. Surprised
