[ Grammar ]
Scientists have conducted ______ research to find a cure for the disease.
A. a number of
B. many
C. a lot of
D. a few

Random Topics:
Past form of ModalsModal Verbs & Time PrepositionsLinking Words & PhrasesNoun, Adjective, and Adverb ClausesGrammar Comma UsageHave vs. HasCan, Could, May, MightInfinitiveBe Going To vs. WillVerbs + Gerund or InfinitiveOther quiz:
Grammar › ViewChoose the correct sentence.
A. These are my friends. There from Brazil.
B. These are my friends. They from Brazil
C. These are my friends. Their from Brazil.
D. These are my friends. They’re from Brazil.
Grammar › View
Zorbing, ________ is an activity from New Zealand is popular around the world nowadays.
A. which
B. that
Correlative Conjunction & Complex Sentences › ViewThis ,,, the end of grammar review for today.
A. are
B. have
C. am
D. is
Vocabulary › View
Replace the word in quotation marks.
My “argument” is that dogs are better than cats.
A. claim
B. contribute
C. conclude
D. infer
