[ Grammar ]
I _________ happy if the experiment works.
A. am
B. ‘ll be
C. is

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Present tense AffirmativeNoun, Adjective, and Adverb ClausesConditional Sentences and AdverbsVerb AbilityVerb PhrasePast and Present ContinuousMesopotamia VocabularyPassive Voice with Modal VerbsComparative AdjectiveSentence Fragments and Complete SentencesOther quiz:
Grammar › ViewThe pop star ……. (tour) since 2000.
A. have been touring
B. toured
C. has been touring
D. is touring
Modals › View
You ____ drink coffee at night. I told you to stop!
A. mustn’t
B. have to
C. don’t have to