[ Relative Clauses and etc ]
Humans __________ the planet for centuries.
A. have been damaging
B. have damaged
C. has damaged
D. have been damaged
Select your answer:

Random Topics:
ProverbsPast Simple, Past Continuous, Past Perfect, Past Perfect ContinuousPrepositions of Time & PlaceModal Verbs & Perfect InfinitiveTenses of VerbsSecond Type ConditionalClauses and ConjunctionGrammar of Conjunctions and PrepotitionsApostrophe GrammarThe Structural Types of SentencesOther quiz:
Grammar › ViewChoose the correct preposition:
____ Monday
A. in
B. at
C. on
Vocabulary › View
The abandoned dog __________ away when I tried to help.
A. flinched
B. abrasive
