[ Present Tenses ]
A group of scientists are travelling around Africa. How many countries _____ so far, I wonder?
A. have they been visiting
B. do they visit
C. they have visited
D. have they visited

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Will and Will notVerb Tenses and Past ParticiplesPersonal PronounPast PassiveHave as verb and auxiliaryPast Simple VerbsProgressive TenseVerb PatternsPassive Voice in Past Simple TenseNoun, Verb, AdjectiveOther quiz:
Subordinating Conjunctions › ViewHaizum is always happy _____ cheerful.
A. because
B. and
C. unless
D. but
Vocabulary : Coming & Going › View
If there’s a café …….., we could stop for a snack.
A. pack
B. nearby
C. passport
D. platform
Phrasal Verb › Viewrefuse an offer
A. Turn away
B. Turn off
C. Turn down
D. Turn in
Would/would like - affirmative/negative › View
He _ go to the beach if it were hot outside.
A. would
B. wouldn’t