[ Grammar & Vocabulary ]
They encouraged citizens to sort waste into categories, ______ improves recycling efficiency.
A. what
B. that
C. how
D. which

Random Topics:
Grammar - Be going toMust Vs Have toPhrasal Verb & Prepositional PhraseNoun FormationVerbs and Subject Verb AgreementTenses and ComparisonsIrregular Plural NounsArticles - rulesVocabulary, Adjective & PrepositionPresent PerfectOther quiz:
Vocabulary › ViewHe always tries to explain the new grammar _____________.
A. clearly
B. normally
C. nearly
D. inside
Grammar › View
I can’t be a detective. I haven’t got the skills ____ the qualifications
A. or
B. nor
C. and
Grammar › ViewChoose the correct word to complete the sentence: The cat chased _______ tail.
A. it’s
B. its
C. its’
D. it
Tenses › View
He is ____ black jacket today.
A. wears
B. wear
C. wearing
D. is wearing
