[ Grammar ]
The bark of some species of oak trees yields a substance used in —- leather.
A. treating
B. to treat
C. its treatment
D. it treats

Random Topics:
Zero and First ConditionalsPossessive Adjectives VS Possessive PronounsReported Speech and SubjunctivePaired ConjunctionToeic VerbSynonymsState Verbs and Action VerbsPresent Simple TenseActive and PassiveIntermediateOther quiz:
Present simple & Continuous › View“think” is ………..
A. state verb
B. action verb
C. state verb & action verb
Future Tenses › View
If you ….. me the truth, I will never speak with you.
A. won’t tell
B. won’t be telling
C. don’t tell
Grammar › ViewWhich word belongs in the blank: If I can’t have the chocolate bar, ______ I’ll just have hot chocolate instead.
A. than
B. then
Comparative Adjectives › View
London is _________ than Glasglow.
A. more busy
B. busier
C. busyer
