[ Grammar ]
If you want to be an astronaut, you need to experience microgravity on a _______ flights.
A. habitable
B. universal
C. parabolic
D. unhabitable

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Simple Present and Simple PastVerb Tenses and UsagePassive SentencesConditionals and Modals of Probability-ed/-ing AdjectivesModals for RecommendationsVerbs and Possessive AdjectiveAdjectives and comparisonsVocabulary and Sentence StructurePresent Simple and Past ContinuousOther quiz:
Grammar › ViewDraw two oranges on____blackboard.
A. An
B. A
C. The
D. No answer
Modal Verbs › View
… I help you with your umbrella?
A. Must
B. Would
C. Can
