[ Relative Clauses ]
Do you know the reason _______we should learn English?
A. who
B. when
C. where
D. why

Random Topics:
Simple TensesDirect Object and Indirect ObjectSynonymsTOEICModal Auxiliaries and To Be VerbsPassive Voice, Question Tag, PrepositionsModals "Should"Present Perfect and Present Perfect ContinuousModals with Perfect InfinitivePast Tense & Past Continuous TenseOther quiz:
Grammar › ViewWhich sentence is stronger?
A. You have to cook for your mom.
B. You are supposed to cook for your mom.
Grammar › View
Many people are too reliant on their smartphones as these devices ___________________ an inseparable part of their lives.
A. became
B. will become
C. have become
D. are becoming
Conditional Sentences › ViewI would have visited you before if there _____ quite a lot of people in your house.
A. hadn’t
B. hadn’t been
C. wouldn’t be
D. wasn’t
State Verbs and Action Verbs › View
This dress _________a lot! I don’t need it!
A. costs
B. cost
C. is costing
D. costing
