21.One pound is __D__to 0.454 kilograms.
A.valuable B.worth C.same D.equal
22.Don't regard any criticism of your pian as a personal__C__on you.
A.treatment B.influence C.attack D.vision
23.You did me a great__A__by finding a part-time job for my son in your company.
A.favor B.honor C.pleasure D.exception
24.Stop reading in bed. __B__you'll need a pair of glasses in no time.
A.unless B.otherwise C.nevertheless D.however
25.Iprefer to keep reporters__C__a distance to give myself some quiet moments.
A.from B.in C.at D.against
26.In this material world more often than not people judge a person's__A__by material possessions.
A.worth B.wealth C.honor D.ambition
27.A thousand dollars may seem nothing to you,but it can make a great__B__to a poor family.
A.supply B.difference C.stock D.importance
28.Seeing that the guests were eying the food eagerly,the chairman decided to__D__his speech.
A.get over B.end up C.hold in D.cut short
29.Simon will never forget the__C__on which he had Bill Gates sign his notebook.
A.time B.circumstance C.occasion D.location
30.Headaches,dizziness,short breaths are possible __B__of high blood pressure.
A.causes B.symptoms C.qualifications D.instances
答不对题
本回答被网友采纳22, 根据空后的介词 on，可
排除A和D。再根据句意可知不是influence（影响）而是attack （攻击）。
23, 根据by finding me a part-time job for my son （替我儿子找到一份兼职工作），可知是帮了我大忙。短语 do sb a great favor （帮某人一个大忙）符合题意。
24, 第一句话：不要在床上看书。
第二句话：你会马上需要一付眼镜。
两句话之间的关系应该是：要不⋯就⋯。四个选项中：unless ＝if not ( 如果不⋯）, nevertheless （尽管如此），however （然而）均不可表达。而otherwise ( 否则，要不⋯就）正好连接这两句话。
25, keep (...)at a distance 是一固定短语，意思是：和（....)保持距离，同（...)疏远，对（...) 冷淡，远避⋯。
麻烦有空看下剩下几题，谢谢
追答26, judge... by material possessions 根据物质财富
来衡量⋯。
A，价值。B，财富。C，荣誉 D，雄心。显然只有A正确。
27, make a difference to ... 对... 有关系，有影响。make a great difference 有很大关系。
没有make a supply 和 make a stock。
importance 前不用不定冠词，没有a great importance
28, cut short 缩短。符合句意：看到宾客们眼巴巴的想开吃，主席决定缩短讲话。
get over 恢复，end up 是不及物词组，不可接名词his speech。hold in 抑制，约束。
29, occasion 场合，on which 即on the occasion 而in circumstances, location ( 位置），time （时间）不能用on。
30, 作为＂病＂高血压的表现，头痛，头晕和呼吸急促是症状symptoms , 不是原因cause, 资格、条件qualifications, 也不是例子instances 。