Traffic congestion causes stress and pollution, ______ are serious urban issues.
A. which
B. they
C. that
D. those

Random Topics:
Miscellaneous Grammar UsagesIndefinite PronounsProgessive TensesInversion + Passive VoiceFuture Tense and ConditionalsPresent ContinousCommon & Proper NounsGrammar - Collective NounsAdjectiveQuantifiers and AdjectivesOther quiz:
Grammar › ViewEvery sentence has a _______ and a _________
A. noun and a pronoun
B. adjective and adverb
C. start and finish
D. subject and predicate
Vocabulary › View
My cousin is a _________________. He never got married.
A. Toddler
B. Orphan
C. Bachelor
D. Spinster
E. Relative
______I might, I couldn’t open the door.
A. However hard
B. No matter
C. Try as
D. As try
Conditionals › View
Construct a third conditional sentence using the words: ‘If / I / have / known / you were coming, / I / bake / a cake.’
A. If I had known you were coming, I would have baked a cake.
B. If I have known you were coming, I will bake a cake.
C. If I knew you were coming, I would bake a cake.
D. If I had known you were coming, I baked a cake.
