[ Tenses ]
Life ____ greatly since Thomas Edison ____ the first light bulb in 1879.
A. is changing / was inventing
B. has been changing / has invented
C. has changed / invented
D. changed / has been inventing

Random Topics:
Sentence Structure and Grammar RulesArticleModals: Possibility, Necessity, ExpectationNeither/Either/All/NoneIntermediate PrepositionsRequest with Modal VerbsGerund or InfinitivePersuasive TextActive & PassiveAdverbs (manners & modifiers)Other quiz:
Verb To Be › ViewThey _____ students.
A. is
B. are
C. am
Grammar › View
______ they play football every day?
A. Are
B. Is
C. Do
D. Does
Adjectives and Adverbs › ViewI can run pretty ______
A. good
B. well
Simple Present Tense › View
This animal can run very fast. It has a very long neck. It _____leaves. It has four long legs. It’s a giraffe.
A. Eat
B. Eating
C. Eats
D. To eat