He feels tired because he (work) hard for months.
A. are working
B. has been working
C. had been working
D. will have worked

Random Topics:
Comparison DegreePreposition of PlaceSimple Present and Simple PastSimple Present and Past TensePast Tense and Past ContinuousModal Verbs in Conditionalsso vs suchTenses and FoodReflexive Pronouns & Modal VerbsFirst ConditionalsOther quiz:
Conjunctions › ViewIdentify the conjunction in the sentence as coordinating, correlative, or subordinating.
What is your name, and where do you live?
A. coordinating
B. correlative
C. subordinating
Passive Sentences › View
The old woman sells shoes.
A. Shoes are being sold by the old woman
B. Shoes have been sold by the old woman
C. Shoes are sold by the old woman
D. Shoes is sold by the old woman
Nouns and Quantifiers › ViewI have _________ money left, so I have to go to the bank and get some.
A. hardly little
B. a little
Grammar › View
I will gradute in June. I will see you in July. By the time I (see) ____ you, I ( graduate) ____
A. saw – graduated
B. see – will graduate
C. see – will have graduated
D. have seen- will have graduated
