[ Grammar ]
Air pollution, together with littering, has _____ many problems in our large cities today.
A. caused
B. made
C. affected
D. brought

Random Topics:
InfinitiveSimple Tenses in EnglishVerb AbilityCardiology ServicesKinds of NounsPassive Voice - Present TensesSimple TensesGrammar and EssayConditionalsGerund - to InfinitiveOther quiz:
Progressive Tense › View”We caught the enemies! They (to spy) on us!”
A. Was spying
B. Were spiing
C. Were spying
D. Are Spying
Grammar › View
I bought a knitting _______ and asked my grandmother to teach me how to knit.
A. fold
B. kit
C. improve
D. relax
Vocabulary › ViewTo approve and adopt an official document.
A. ratify
B. veto
C. appeal
D. submit
Present Tenses and Vocabulary › View
I’m going to roll up my ………………. and start cleaning the house.
A. sleeves
B. shirts
C. trousers
D. ties
