[ Grammar ]
Scientists ………. life on other planets yet.
A. didn’t discover
B. haven’t discovered
C. aren’t discovering
D. don’t discover

Random Topics:
Direct and Indirect SpeechCoordinating Conjunctions and Comparative AdjectivesAdjective SuffixesPassive Voice with Modal VerbsConditionals 1,2,3Asking and Giving OpinionGrammar - SimilesWish SentenceCausative VerbGerund - to InfinitiveOther quiz:
Conjunction: Because and So › ViewJosh likes football ……. he doesn’t like basketball.
A. and
B. but
C. so
D. because
Grammar › View
You ___ eat vegetables if you want to be healthy.
A. can
B. shouldn’t
C. should
D. don’t have to
Prepositions of Place › ViewYour glasses are right _______ you….
A. in front of
B. on top of
Grammar › View
Mariam couldn’t buy lunch _______ she had lost her bag.
A. because
B. so
C. or
D. although
