[ Relative Clauses ]
As a university student, you should know____to use a library very well.
A. how
B. what
C. that
D. who
E. which
Select your answer:

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Grammar › ViewOther radioactive elements ______ since: actinium (Debierne), radiothorium and mesothorium (Hahn), ionium (Boltwood), etc.
A. were discovered
B. are discovered
C. have been discovered
D. had been discovered
Passive Voice › View
Vision _________ by Scarlet Witch . (Past Simple)
A. is loved
B. was loved
C. has been loved
D. is being loved
