[ 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

Random Topics:
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:
Modal Verbs › ViewA: We passed a lake about five minutes ago!
B: So, we _______________past the road we need to take!
A. must drive
B. must have driven
Grammar › View
Change this sentence into passive!
A: Ahmad writes a letter
P: …………………………………………..
A. A letter is wrote by Ahmad
B. A letter are wrote by Ahmad
C. A letter is written by Ahmad
D. A letter are written by Ahmad
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
