[ TOEIC ]
Sustainable ______ is the key indicator of the long-term health of the economy.
A. produce
B. to produce
C. productive
D. productivity

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Grammar - direct/indirect objectsSimple Present ProgressiveVerb PatternsHope, Thank, Modal VerbsPrepositionComparison Degree & GerundsPresent and Past Simple PassiveSubject Verb Agreement and Coordinating ConjunctionsDefinite vs Zero Article Abstract NounsPresent Perfect Simple & Present Perfect ContinuousOther quiz:
Grammar › ViewIt was time to enjoy the hotel pool _____ a long day exploring the interesting streets of Bangkok. I also finally got my hands on a Pina Colada, what a beautiful day!
A. when
B. before
C. after
D. within
Grammar › View
May we stay for dinner tonight?
A. Permission
B. Request
C. Offer
Tag Questions › ViewYou haven’t tidied your room,_______
A. have you?
B. do they?
C. aren’t we
D. was it?
E. haven’t you
Grammar and Vocabulary › View
Look at that man! He ____________ off his ladder is he isn’t careful.
A. is going to fall
B. is falling
C. will fall
D. falls
