[ Grammar ]
To be effective, communication must also include ____________ , also known as a return message.
A. sender
B. receiver
C. message
D. feedback

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Suffixes (ing-ed) SentencesContinuous and Perfect TensesComparison DegreeGerund vs InfinitivePresent Progressive Tenseas...as, comparatives, superlativesDemonstrative SpeechGrammar - to be, possessive, have gotCan/CouldPast Perfect Simple TenseOther quiz:
Tenses › ViewWhen I was a child, I ……….the violin.
A. was playing
B. am playing
C. played
D. play
Present Tenses › View
I ……………….. for the manager for two hours.
A. am waiting
B. wait
C. has waited
D. have waited
