[ Past Tenses ]
I … about that book until you mentioned it.
A. hadn’t heard
B. hadn’t been hearing

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Preposition of PlacePast Continuous vs Past SimpleSynonymsParticiple - ing/ edPast Perfect SimplePassive Voice and Relative ClausesThird ConditionalsArticles & Compound NounsArticles with Proper NounsContinuous and Perfect TensesOther quiz:
Present Simple & Present Continuous › ViewThe sun (1)__________ , and you (2) ___________ in the right place to take the photo.
A. (1) shine … (2) do not stand
B. (1) shines … (2) is not standing
C. (1) is shining … (2) are not standing
D. (1) shines … (2) are not standing
Future Tense › View
Hurry up! The conference (begin) in 20 minutes.
A. will begin
B. is going to begin
C. will be beginning
D. begins