[ 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:
Reported Speech › ViewThey said, “We have just arrived.”
A. They said that they have just arrived
B. They said that they had just arrived.
Grammar › View
The pain in my leg is ……… than it was yesterday.
A. bad
B. more bad
C. worse
D. worst
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
