[ Grammar & Vocabulary ]
Einstein is the person … showed that time can speed up or slow down.
A. which
B. who
C. whose
D. where

Random Topics:
Have toVerb PatternsModal Verbs of PermissionProgressive Verb TensesPrepositions of Location, Movement and TimeGerundSimple Past TensesDefinite vs Zero Article Abstract NounsSimple Present and Simple PastVocabulary, Adjective & PrepositionOther quiz:
Grammar › ViewI have _____ houses.
A. a
B. an
C. many
D. is
Grammar › View
Duracell batteries ______ longer than any other.
A. lasting
B. lasts
C. last
Tag Question › ViewEverybody looks tired, ________?
A. doesn’t it
B. don’t they
C. does it
D. do they
Tenses › View
I ___ at this company since 2020.
A. worked
B. have worked
C. work
D. will work
