GMAT真題：2010年12月語法真題（至12.19）（二）
    8. estimate的用法 有一個選項是estimate a decrease...over last years
    剩下四個選項都是estimate that 中間加完成時態(tài)...over last years 搞得我很糾結(jié)
    9. 某種tree后面跟without enforcing 其它選項還有without enforcement of，without being enforce之類的 我選的without enforcement of 嚴(yán)重謹(jǐn)慎參考
    The publication of XXX's book, unlike yyy's and zzz's, is...主謂一致是個考點 后半句還有一個考點 要注意主語是指的publication， 而不是作者
    10. attempt的用法
    做動詞時：attempt to do sth
    做名詞時：1. attempt to do sth or attempt at doing sth
    Eg. They made no attempt to escape. Or they made no attempt at escaping.
    2. attempt at sth means thing produced by sb trying to do or makesth
    Eg. My first attempt at a chocolate cake tasted horrible.
    3. attempt on sth
    Eg. The lastest attempt on the world land speed record
    11.xx plants contain more xxx，(實在記不清這里有沒有逗號)and have more ** than those of any other ecosystem
    B，than does any other ecosystem
    12.XX人。。。。become to politician，列了一堆什么科學(xué)家，藝術(shù)家這些頭銜。。。
    B,become to a