[ 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:
Grammar › ViewWhich sentence is written correctly with an introductory phrase or word?
A. Yes, I am aware of the increase in participation.
B. Yes I am aware, of the increase in participation.
C. Yes I am aware of the increase in participation.
D. Yes I am, aware of the increase in participation.
Grammar › View
A _______ of kittens is drinking milk in the kitchen.
A. group
B. litter
C. flock
D. gang
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