[ Perfect Tenses and Vocabulary ]
How long have you…………Carla?
A. know
B. knew
C. known
Select your answer:
Random Topics:
Sentence StructurePreposition on TimeArticles and PrepositionsAction VerbPresent Continuous TenseSuperlative AdjectivesPast Simple and Past ContinuousGerund and InfinitivesSimple Present VS Present ContinuousOther quiz:
Modal Verbs › ViewHe ___ have finished his homework by now.
A. must
B. can
C. might
D. should
Vocabulary and Grammar › View
Do you know the reason ……. humans are interested in Mars and other planets in thesolar system?
A. which
B. that
C. why
D. whose