[ Tenses ]
I _____(not/know) the answer to this question.
A. am not know
B. don’t know
C. didn’t know

Random Topics:
Modals of AdviceTenses, Tag Questions, Phrasal VerbsConjunctions - Connectorswill, be going to, would like toAdverbs of DegreePast PassiveWord FormationLinking Verbs & Helping VerbsGrammar - Sentence StructureQuantifiers MixOther quiz:
Grammar › View______ is going to give a talk on home safety?
A. Who
B. What
C. When
D. Whom
Comparison › View
My town is _______________ this city.
A. peaceful than
B. more peaceful
C. more peaceful than
D. peacefuller than
Past Simple Verbs › ViewWe ___ (lose) our phones.
A. losed
B. lost
C. losd
Grammar › View
Bodrum is a popular holiday spot ___ a lot of tourists go.
A. who
B. which
C. where
D. what
