Fries's Structure of English, language teachers have described English words as falling into two broad types: those that belong in the dictionary like 'storm' and 'confabulate', called content or lexical words, and those that belong in the grammar like 'of' and 'the', called structure, function or grammatical words.
tl;dr: Structural Words are the meaningless little words in a sentence that make it flow or move from one important word to the next.
The answer is (B) The most crucial safety tip a rider must always follow is wearing a properly fitted helmet.
(A) Informs you on the price of horses
(C) Gives you a definition of what horse reins are.
(D) Describes what a horse looks like.
Patricia Costello Argus that some of the red barons victories were due to his strong leaderships not just his flying skills
3. would be/knew how
The first blank must be future tense because the word after it ends in -ing
The second blank must be ____ how, and it must be past tense, so knew how. She knows <em><u /></em><em>why </em>the business would be started, to provide a great public service, but not <em>how</em>.