251.Tens of trees were cut down during the night,but no one knew ______.
A.who
B.by whom
C.who to do so
D.who does that
252.The young mother saw her baby fall to the ground,______ brought her heart to her mouth.
A.it
B.and which
C.and that
D.this
251.答案是B;
根据句意得知:没人知道树木被谁砍伐。故选B。
252.答案是C;
考查代词的指代。此题解题关键是标点符号。C选项and that可改成zwhich引导非限制性定语从句。
253.Dr.Black comes from either Oxford or Cambridge.I can't remember ______.
A.where
B.there
C.which
D.that
254._____ do you find his suggestion?
A.Whom
B.How
C.Which
D.What
253.答案是C；
由either Oxford or Cambridge得知，记不清楚是哪个地方，故选C。
254.答案是B；
征求意见时常用句型:How do you find/like…?或What do you think of…?你觉得…怎么样？
255.Zhaopin.com did a survey of _______students spent on job hunt and found the expense varied from person to person.
A.how many
B.where
C.how much
D.why
256.______ seems to be a strong competition in China for senior high students to enter universities does exist in other countries.
A.It
B.There
C.What
D.That
255.答案是C；
此处how much充当spend的宾语。
256.答案是C；
what引导主语从句，此句谓语是does exsit。
257．Thanks to the application of new farming methods,output is now six times _______ it was before 2008.
A.that
B.what
C.which
D.when
258.The manager decides to give the job to _______ he believes have a strong sense of duty.
A.whoever
B.whomever
C.anyone who
D.those who
257.答案是B；
此处考查倍数的表达法。常见的结构有:1.A is X times 比较级than B;2.A is X times as 形容词院级 as B;3.A is X times what is…
258.答案是D；
注意从句中的谓语是have，若选A或C，从句谓语应改成has。
259.Sometimes advertisements make ______ possible for companies to sell the costomers ____ money can't buy.
A./;that
B.it;what
C.that;which
D.it;whose
260.The rescue team are considering _____ they can do more for the people suffering from the earthquake.
A.whatever
B.what
C.how
D.where
259.答案是B;
第一空考查make it adj.for sb. to do sth.;第二空what引导名词性从句。
260.答案是C；
此句中how表示方式，意为“如何”。