[ Present Perfect Continuous Tense ]
The Scientist mixes the formula
A. The Scientist has been mixing the formula
B. The Scientist has been mixxing the formula

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Tenses and StructureGrammar - QuantiflierPast simple vs Present perfectWas and WereMaritime Vocabulary and GrammarVerb AbilityPast Perfect TenseFuture TensesModals and Active and Passive VoiceLinking Words & PhrasesOther quiz:
Grammar › Viewchoose the one similar in meaning to:
AS FAR AS meals ARE CONCERNED, they breakfast, lunch and dinner are included in the basic service pack.
A. Regarding
B. In other words
C. By the way
D. At least
Future Tense › View
David _____ ___ angry if we don’t pay our debt to him
A. Will
B. Will be
C. Will not be
D. Will not
Vocabulary and Grammar › View. My wife’s mother is my _______.
A. aunt
B. mother-in-law
C. sister
D. mother
Personal Pronouns › View
… are watching TV. (my mother and I)
A. Them
B. We
C. They
D. You