Experts say there might ______ (be) only 540 Amur tigers left in the world today.
A. been
B. have be
C. be
D. been

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Present Simple and Modal VerbsGerunds & Infinitives + VocabularyPast Tense vs Future TenseAdverbs by TypeFuture Perfect TensePast Perfect TenseAdjectives and comparisonsCardiology ServicesPresent Perfect - Just, Already, YetModals of AdvisabilityOther quiz:
Vocabulary › Viewtranscript
A. the art of making beautiful handwriting
B. a message sent by telegraph and then delivered in written or printed form; sometimes referred to as a wire or cable
C. a written, printed, or typed copy of words that have been spoken
D. shown or described in a very clear way, used especially to refer to things that are unpleasant or shocking
Sentence Adverbs & Third Conditional › View
Choose the correct sentence adverb to complete the sentence: ‘________, he had no idea about the surprise party.’
A. Interestingly
B. Naturally
C. Evidently
D. Apparently
Grammar › ViewCalm down. There is ____ to worry about.
A. nothing
B. anything
C. something
D. everything
Past Modals › View
I haven’t got my wallet. I ____ left it at home.
A. should have
B. must have