1.Fibers of hair and wool are not continuous and must normal

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1.Fibers of hair and wool are not continuous and must normally be spun into thread____ woven into textile fabcrics.
when to be/if they are to be
2.The ambassador heard that ____ at his ppost a year longer.
he be staying /he would be staying
3.—what do you think of the boxing match last night?
——I really ___ think Jackson _____
don't...has won/didn't ...would win
4.great efforts to increase agricultureal production must be made if food shortage ___ avoid.
is to be/can be/will be/has been

1、when to be 这是非常简洁的用法.
2、he would be staying 他听见别人说时,应当是"You will be staying",转述时,自然变成"would".
3、didn't ...would win 问句虽然是用现在时态,但回答时用的是昨晚的想法.用don't 本无不可,但后面用has won显然不通.
4、is to be 这里用的被动式,相当于“如果要避免食物短缺”,to be 的意思是比较强烈的.其他三个都不合适.在if后面,will be和has been的时态不对,can be的意思不当.
再问：谢谢，课第一题答案选的是第二个，困惑中
再答：从语法上讲，第一种并无不对。但if they are to be的强调意味更浓，译成中文，有如下差别： if they are to be：如果要将它们织成纺织品的话。 when to be：当它们织成纺织品时。

1.Fibers of hair and wool are not continuous and must normal 一个英语选择题,急Fibers of hair and wool are not continuous and must 求专4英语语法题详解1.Fibers of hair and wool are not continous and mu This nice wardrobe is not made of wool, ___ from plastic and 1.It's warm and wool and rhymes with "better". The hair clips are on the first floor and they are not very normal wear and prensent simple and present continuous, 英语翻译helps normal development,maintenance of bones,teeth,and 连词成句:the,the,and,CDs,hair,clips,bear,of,on,some,are,right,th the,the,and,CDs,hair,clips,bear,of,on,some,are,right,there(连 It is said that Yrtis are heavily built and full of hair.