[ Grammar ]
The old traffic lights weren’t successful………. someone needed to change the lights from red and orange to green. Modern lights don’t need people to change them.
A. so
B. Because

Random Topics:
Tenses and OpinionsGerunds and ModalsPrepositions and TensesGrammar (either..or.. and neither..nor..)Tenses and VerbsArticles A and AnThe Simple Present Tensetake, make, doModals of AdviceNounOther quiz:
Simple, Complex, Compound Sentence › ViewThe man believed in the system, and he knew that justice would prevail after the murderer was in jail.
A. Simple Sentence
B. Compound Sentence
C. Complex Sentence
D. Compound Complex Sentence
Vocabulary › View
to leave one’s home country or area to live in another
A. population density
B. emigrate
C. dictatorship
D. import