The exam was very easy,wasn't it?
yes,but i don't think ____ could pass it.
答案：B anyboby
解析：somebody 和 everyboby 都用在肯定句,前者表示會有人,后者表示每一個人；anybody 用在否定句,nobaby 表示否定意思,等于 not anybody.本句中 I don'tthink 是由于主句的 think 的要求,把從句的否定轉(zhuǎn)移到主句,因此從句應(yīng)該按否定處理.
It's difficult to tell the twins one from____
答案：A the other
解析：twins 意思是雙胞胎,one 指兩個中的其中之一,the other 指另一個,如果用 the others,就變成多胞胎.
This exercise is ______difficult______.
答案：B so;that few of us can do it
解析：
A.so; that few of us can do：that 從句中的謂語動詞 do 是及物動詞,此處缺少賓語.
C.too; for anyone of us to do：語法沒錯,但在意思全部否定,即我們?nèi)魏稳硕甲霾涣?有些絕對,根據(jù)最佳原則,B 表示的“幾乎沒幾個人做得了”,還是留有余地好.
D.too; to do it:too ...to do 表示“太...做不了”,不定式屬于句子的附加成分,邏輯賓語是句子的主語,加 it 意思重復(fù).
The city center wasn't so crowed this morning _____it usually is.
答案：D as
解析：這是個 not so ...as ...句型,表示 “A 不如 B 如何”,本句意思是“今天上午市中心不如平時擁擠”.