[ Adverbial Clauses ]
Henry will certainly have finished his project ______ our voluntary campaign this summer.
A. when he joins
B. by the time he joined
C. while he is joining
D. as soon as he will join

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Present Tense vs Present ContinuousPast Simple and Past ProgressiveReflexive pronounsGrammar: so and suchSimple Present ProgressiveRelative PronounTensesFirst Conditional, Future Time ClausesPrepositions of TimeDegrees of ComparisonOther quiz:
First & Second Conditional › ViewIf I want a new car, I ____ one.
A. will buy
B. would buy
C. buy
Adverb and Noun Clauses › View
Art critics do not all agree on what ______ a painting great.
A. qualities make
B. are the qualities for making
C. qualities to make
D. do the qualities that make