[ Science ]
Scientists have found only 2 substances in the whole universe. What are they?
A. Matter and Air
B. Oxygen and Mass
C. Matter and Energy

Random Topics:
Conjunctions and Verb TensesModal "Have to"Prefixes SuffixesHomophonesGrammar - Present Perfect with already, just, yetModals of ProhibitionSimple Future - PassivePronouns and AntecedentsModals for ObligationPresent and Past TenseOther quiz:
Grammar › ViewHe ________ sick last week.
A. is not
B. did not
C. are not
D. was not
Grammar › View
A: Is Devi here?
B: Oh, he’s _____ left, I’m afraid
A. yet
B. just
C. still
D. already
Grammar › ViewCarla feels ______when she’s relaxing in the garden with a good book.
A. happier
B. more happy
Grammar › View
When we ………….. (see) Ati and Wia, they …………… (play) tennis.
A. were seeing, were playing
B. saw, were playing
C. were seeing, played
D. see, play
