We used it to indicate that you are not sure of the statement, and you may be wrong
A. as long as
B. as far as i know
C. as far as i´m concerned
D. as far as i concern

Random Topics:
Similes, Metaphors, Personification and HyperboleAdverbs and AdjectivesPast Continuous and Past Simple TenseImperative SentencesPunctuating ClausesCountable - UncountableFinite and Non-Finite VerbPresent Simple ProgressiveAdjectives & QuantifiersPast TenseOther quiz:
Tenses › ViewWhich tense is used for a past action that happened before another past action?
A. Past Perfect Tense
B. Simple Past Tense
C. Present Continuous Tense
D. Present Perfect Continuous Tense
Grammar › View
In the last few years, Houston, Texas, has experienced the most great increase in population of any major city in the United States. Which one is incorrect word/phrase?
A. few
B. has experienced
C. most great
D. of
However, he didn’t find anything unusual enough ………. why she could remember so much about her life
A. to explain
B. explaining
C. explains
D. explain
Adverbial Clause › View
She went to the store _____ she needed to buy some groceries.
A. because
B. although
C. unless
D. when
