10. Although the chemical elements niobium and tantalum are not quite zirconium and hafnium, the differences between them are slight (A) as similar (B) as similar as (C) similar than (D) that similar
why b? 如何翻译, adj slight修饰adj similar 这对么?
14. A lingua franca is any auxiliary language, -------a rudimentary kind, used as a medium of communication between people who speak different languages. (A) of which usually (B) which usually of (C) is usually of (D) usually of
why d ? not a? usually a rudimentary kind of lauguage , of language 提前成of which 作同位语,不对么?d作同位语如何理解!怎么理解这题?