2016年托福语法解析：不定冠词

　　不定冠词(a/an 划线，80%都是错误的)

　　(1)a/an的區別(元音而非元音字母)

　　an: hour, undergraduate ,understanding ,oyster牡蛎 ,honest ,emotion, atom a : unique ,university, unite, yawn

　　The Everglades湿地, a large swamp (area), is (an) unique (wilderness) extending over (much) of southern Florida.

　　答案: B anàa

　　(2)a/an与复数名词的混用

　　a /an+ adj. + 单数名词

　　! the + adj. + 複數n 不一定

　　例题：

　　15. Jim Thorpe, (a football), track, and baseball (stars) from Pennsylvania, is considered (by many to) be the (greatest) all-around athlete of modern times.

　　答案: B starsàstar C中by many to=by many people

　　16. (For) a seagoing, cargo-carrying sailing (vessels), the clipper ship was (remarkably) (fast).

　　答案: B vesselsàvessel

　　(The) planet Mars is a (freezing), barren (deserts) with huge, dry canyons (and) towering volcanoes.

　　答案: C desertsà desert

　　The Rocky Mountains (were) explored (by) fur traders during the early 1800’s, in (a) decades (preceding) the United States Civil War.

　　答案: C aàthe