[ Adverb of Manner ]
They have learned to greet a customer …
- proper
- properly
- properter

Random Topics:
Grammar - Present Perfect with already, just, yetComparative and SuperlativesContrastive Conjunctions-ing form and the to-infinitivePast Simple - Present PerfectModal Verbs for SpeculationInterjection & Prepositional PhrasesPrepositions and Phrasal VerbsTenses and StructuresMixed ConditionalsOther quiz:
Grammar › ViewHe had an accident two weeks ________.
A. since
B. ago
C. at the moment
D. now
Simple Compound and Complex Sentences › View
We should eat dinner before we go to the party.
A. simple
B. compound
C. complex
Homophones › ViewThe new building will greatly ________ my company’s productivity.
A. Affect
B. Effect
Phrasal Verbs › View
I’m so tired of Sophie _____ her engagement ring all the time.
A. showing off
B. showing up
