a symbiotic relationship between members of two species in which both benefit
A. commenalism
B. parasitism
C. symbiosis
D. mutualism
Random Topics:
Present Progressive (Future)ComparisonModals and Adjectives (ed-ing)Past PassivePronoun & Present SimpleComparatives and ConjunctionsSimple Past Tense and Past Perfect TenseAcademic VocabularyPrepositions after VerbsModals and Present TensesOther quiz:
Grammar › ViewDavid and Jonathan car broke down yesterday.
A. David’s and Jonathan car broke down yesterday.
B. David and Jonathan’s car broke down yesterday.
C. David’s and Jonathan’s car broke down yesterday.
D. David and Jonathans car broke down yesterday.
Past Perfect Simple Tense › View
She ____________________ in China before she went to Thailand
A. was live
B. didn’t lived
C. had live
D. had lived
Grammar › ViewComplete. Use the correct form of used to and the verb in brackets.
…………………………………………. your dad ………………………………………. (work) at the sports shop?
A. Does your dad used to work
B. Did your dad use to work
C. Is your Dad used to work
D. Did your Dad used to work
Articles and Quantifiers › View
we use ___ the second time we mention a person / thing.
A. a/an
B. the