[ Grammar ]
I’m sure we … all our energy peoblems by 2050.
A. ‘ll be solving
B. ‘ll have sold

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Tenses & PrepositionModals and InversionHow many / How much - Is there / Are thereConjunctive Adverbs and PunctuationAdverbs of Manner, Likes and PreferencesDefinite vs Zero Article Abstract NounsPresent or Past TensesGrammar - either...or, neither...norPoetryDefinite and Zero ArticleOther quiz:
Vocabulary › ViewWhich is spelled correctly?
A. stumickacke
B. stumicach
C. stomachache
D. stomiake
Present Perfect Continuous Tense › View
How long…(learn / you)…English?
A. have you learning
B. has you been learning
C. have been learning
D. have you been learning
Vocabulary › ViewVy and I often do our ______ after school.
A. science
B. homework
C. football
D. lessons
Aspect or tenses of Verbs › View
David has been living in Raleigh, North Carolina.
A. Simple
B. Progressive
C. Perfect
D. Perfect progressive