[ Grammar ]
Scientists ………. life on other planets yet.
A. didn’t discover
B. haven’t discovered
C. aren’t discovering
D. don’t discover
Select your answer:
Random Topics:
Causative VerbsPrepositions of Time and PlaceSimple Present and Present ContinuousPassive and Active SentencesModal and Phrasal VerbsLinking Verbs and TensesPast simple regular verbsReported Speech and SubjunctiveRelative ClausesPresent Tense VerbsOther quiz:
Grammar › ViewWhat _____ to Jack yesterday evening? He didn’t come to my birthday party.
A. happened
B. was happen
C. did happen
D. was happening
Grammar › View
make point plural
A. pointes
B. points
C. pointies