[ Tenses ]
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:
Modals of Prohibition › ViewPaulo ________go to class today. He is ill.
A. can´t
B. must
C. may
D. can
Grammar › View
You ____________________________ add some cinnamon to your coffee! You may like it!
A. must
B. should
C. have to
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