It is our responsibility to ________ our planet’s ecosystems.
A. preserve
B. preservation
C. preserving
D. preserver
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Contrastive ConjunctionRelative Pronouns with PrepositionsAdverbial Clauses of Reason / CauseGrammar - Present Perfect with already, just, yetVocabulary, Grammar, SpellingVerb & GrammarTo Infinitive/Bare Infinitive/GerundsMixed TensesConjunctionwill, be going to, would like toOther quiz:
Reported Speech › ViewTrace said, “I went to Vietnam to visit my family.”
A. Trace said that she went to Vietnam to visit her family.
B. Trace said that she had gone to Vietnam to visit her family.
C. Trace said that she is going to Vietnam to visit her family.
D. Trace said that she was going to Vietnam to visit her family.
Reported Speech › View
Peter said, “Alice, are you busy now?”
Peter asked Alice ___ .
A) she was busy.
B) if she was busy then.
C) she would be busy.
d) if she is busy.
Grammar › ViewThere used __________ a stadium here, but it closed a long time ago.
A. be
B. to be
C. been
D. being
Grammar › View
Liz ___________ play her guitar 2 months ago, but now she can play it well.
A. couldn’t
B. could
C. can’t