[ Grammar ]
Walter Hunt invented an enormous ………. of devices, including the safety pin and a machine for making nails.
A. number
B. amount
Random Topics:
IF CLAUSEConjunctions and TransitionsSimple, Compound, Complex SentencesDescribing WordsConnectives (because, due to, owing to, because of)Passive SentencePresent Perfect TenseVocabullary TestVerb to beArticles and NounsOther quiz:
Tenses › ViewShe ________ (not, hang up) all the pictures yet.
A. Has not been hanging up
B. Has not hang up
C. Has not hung up
D. Has not been hung up
Present Tenses › View
_____ your brother and sister been getting along?
A. have
B. has
C. are