[ Present Tenses ]
I have read this chapter in my chemistry text three times, and still I ______ it.
A. don’t understand
B. have understood
C. understand
D. haven’t understood

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Verb Tenses and Past ParticiplesSo - Too - Either - NeitherPassive Modals, Impersonal PassivePhrase vs ClauseWH Questions and Simple Past TenseConjunctions - Conjunctive AdverbsComparatives, Superlatives & EquativesBe Going To vs. Willwill, be going to, would like toDescribing WordsOther quiz:
Vocabulary › ViewWhat is the opposite of ‘contrary’?
A. true
B. endless
C. dull
D. main
Vocabulary › View
Which word means “to make something less severe”?
A. Intensify
B. Mitigate
C. Exacerbate
D. Aggravate