9、Hail is formed when a drop of rain is carried by an updraft to an altitude where —— to freeze it 。
A、is the air cold enough B、the air cold enough C、the cold enough air D、the air is cold enough
答案是C,我想知道D为何不对。
18、In the early 1900‘s Roy Harris created and promoted a distinctly American style of classical music and greatly influenced a number of composer in the United States。
答案是distinctly 错。可我觉得composer 也错呀,为什么不用复数呢。前面不是a number of 吗?
19、The eighteenth century witnessed the emergence of North American ports,particular Boston,New York ,and   hiladelphia,as major commercial centers within the British empire。
答案是particular 错,不太明白
22、Onyx is a mineral that can be recognized its regular and straight parallel bands of white,black or brown。
答案是:recognized its 错误。为什么
26、Among the symptoms of measles ,which takes about twelve days to incubate,are a high fever ,swelling of glands in the necks,a cough,and sensitive to light。
答案是sensitive 错误,我不明白 |