[ Vocabulary ]
a necessary predecessor
A. Incompatible
B. Catalyst
C. Precursor
D. Synthesis
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Present Perfect and Present Perfect Progressive TensesShould and Shouldn'tPresent tense AffirmativeGrammar - could / could notVocabulary and ModalsTime Clauses of FutureEssential and Nonessential ClausesNounsPresent Simple: affirmative, negative, interrogativeDo not or Does notOther quiz:
Tenses › ViewHe _____ a famous artist in his youth.
A. becomes
B. became
C. becoming
D. become
Vocab Checking › View
Whenever I spend my holiday with my friends or family, I always have a (n) …. of a time.
A. great
B. multitude
C. whale
D. amount
Grammar › ViewShe worked ___ a rich family and her job was to care ___ the sick grandmother.
A. on
B. in
C. for
D. about
E. to
Grammar › View
Your watch is _________ than mine.
A. the most cheap
B. cheaper
C. more cheap
D. the more cheaper