None of the renewable energy sources _____ completely free from environmental impact.
A. is
B. are
C. has been
D. have been
Random Topics:
Dependent PrepositionsApologizingTenses and Verb FormsGrammar - used toEs and SUnreal ConditionalsFuture - Will and Be going toTenses and ArticlesWill & Be going toComparatives, Superlatives, and ModalsOther quiz:
Grammar › ViewChoose the sentence with the right punctuations
A. I had a lot of fun visiting you last weekend. We made cookies and I ate so many? I hope you can come and visit me
B. i had a lot of fun visiting you last weekend We made cookies and I ate so many! I hope you can come and visit me
C. I had a lot of fun visiting you last weekend. We made Cookies and I ate so many! I hope you can come and visit me
D. I had a lot of fun visiting you last weekend. We made cookies and I ate so many! I hope you can come and visit me.
Modals of Obligation › View
Doctors _____________ wear makeup for work. They can decide to wear it or not.
A. shouldn’t
B. don’t have to
C. should
D. can’t
Vocabulary & Grammar › View‘Sorry. Did you say something?’
‘Yes, I asked you ________ me the salt.’
A. passed
B. to pass
C. please pass
D. passing
Grammar › View
Clive is the man ___ my cousin Lucy.
A. married
B. which married
C. who married