[ Grammar ]
First, with solar panels, it is possible to produce electricity from rays of the sun. Once installed, they provide energy at no cost and with no pollution.
The word “they” means….
A. sun rays
B. electricity
C. solar panels
D. energy

Random Topics:
Relative PronounsSimple vs Present Continuous TensesPast Simple TensesZero & First ContidionalNoun Clausesgoing toAuxiliaries VerbAction vs Linking Verbs/ Verb PhrasesPresent simple & ContinuousModal Verbs - ObligationOther quiz:
Vocabulary › ViewMark believes he can do everything so he is
A. clever
B. serious
C. confident
Modal Probability › View
Choose the correct modal to complete the sentence: “They ______ have left already, but I’m not sure.”
A. must
B. might
C. can’t
D. should
