[ Present Perfect & Past Simple Tense ]
His collection of stamps is really impressive. I wonder how many he …… so far.
A. has collected
B. collected
C. hasn’t collected
D. didn’t collect

Random Topics:
Past Perfect or Past Perfect ContinuousPresent Perfect or Past SimpleContractions and ConjunctionsHave to / Do not have toFuture Continuous TensePossessive Adjectives & Possessive PronounsConnectives (because, due to, owing to, because of)Modal and Phrasal VerbsTenses and FoodAdverb or AdjectiveOther quiz:
Grammar › ViewWhich sentence is correct?
A. I don’t like coffee.
B. I doesn’t like coffee.
C. I does like coffee.
D. None of the above.
Modals › View
Doni is playing games on the smartphone, but actually he … be working on his assignment.
A. should
B. may
C. can
D. would
E. might
Vocabulary and Grammar › Viewto get sufficient rest at night
A. keep fit
B. get enough sleep
C. feel stressed
Grammar › View
I feel pretty good ___________ I didn’t sleep well last night.
A. Providing that
B. Considering that
C. Even if
D. As long as
