[ Subject - Verb Agreement ]
This is one of the books that _____ written by my son.
A. was
B. were
C. been
D. to be

Random Topics:
Simple Present - Negative & InterrogativeCountable & Noncountable NounsContrastive ConjunctionFuture Tense and ConditionalsReported SpeechAdverbs of How Something is DonePassive VoicesPrepositions and ConjunctionsPresent and Past TenseThere is, There are, Some, AnyOther quiz:
Grammar › ViewJohn ___ at the bookstore.
A. work
B. works
C. working
D. worked
Grammar › View
– Where ___ you go last weekend?
– I went to Ho Chi Minh city
A. were
B. did