首页 / This is certainly the case, but ____ it is a mistake or not I don’t know.       A.

This is certainly the case, but ____ it is a mistake or not I don’t know.       A.

This is certainly the case, but ____ it is a mistake or not I don’t know.

      A. if              B. even though        C. whether       D. that

答案

C                        


解析:

引导宾语从句时,whether 和if常可互换,但如从句提前,则只能用whether。  

相关题目

—When is Children's Day? —________ June 1st ________ every year. A．On；/
—When is Children's Day? —________ June 1st ________ every year. A．On；/  B．In；/ C．In；on  D．On；in
 Although her grandma had been ill for a long time, it still came as a shock w
 Although her grandma had been ill for a long time, it still came as a shock when shedied.  A. slightly           B. approximately         C. eventually            
荷兰有“鲜花王国”之称，促使其成为世界鲜花基地的社会
荷兰有“鲜花王国”之称，促使其成为世界鲜花基地的社会经济因素主要是(   ) A．市场需求            B．交通条件的改善 C．花卉栽培技术   
（5分））研究人员，发现菜豆种子在萌发成幼苗的过程中，
（5分））研究人员，发现菜豆种子在萌发成幼苗的过程中，体内储存的有机物会发生规律性的变化。以下是菜豆种子萌发成幼苗的各阶段示意图，请回
It’s time ________our league meeting.A. to begin            B. beg
It’s time ________our league meeting.A. to begin            B. beginning            C. that we begin      D. that we’ll begin
 I like getting up very early in the morning because the morning air is so good
 I like getting up very early in the morning because the morning air is so good ______. A. to be breathed    B. to breathe        C. breathing        D. being breathed
It is reported that the government has ____ the outbreak of violence by sending
It is reported that the government has ____ the outbreak of violence by sending a large group of soldiers to police the area.    A. gone for        B. reacted to        C. appealed
生物体都能繁殖后代，使自己的种族得以延续．（判断对错
生物体都能繁殖后代，使自己的种族得以延续．（判断对错）

最新题目

图2是我国某城市人口数和人口自然增长率变化示意图。读图
下列语句正确的个数是（    ）①直线可以向两方延长②一
下列有关地球公转说法正确的是(     )        A．地球公
Sam remembered several occasions in the past _____ he had experienced a similar
如图8-4-10所示，质量均为m的小车A、B在光滑水平面上以相同
如右上图所示，请你在图中画出点光源S在平面镜中所成的像
  (一)论述文阅读     阅读下面的文字，完成1～3题。（9分
 The stranger stopped and turned around ___________to see is someone was follow
在啤酒生产中用于代替大麦芽完成糖化过程的植物激素是（ 
（江苏扬州2011）在经典诵读活动中，有同学在读下面两首诗
为何值时，是反比例函数，即=            ；
 “举秀才，不知书；察孝廉，父别居。寒素清白浊如泥，高
下列有关性质的比较, 不正确的是 A. 酸性强弱: HI > HBr >
某师傅用铁皮制作一封闭的工件，其三视图如图所示（单位
某CuSO4、Fe2（SO4）3、H2SO4的混合溶液100mL，已知溶液中阳离子
明中后期“奴富至数百万，初缙绅皆丑之，而今则乐与为朋
27. —You look worried. What has happened? —So I do. You see, the computer I
如图所示，倾角θ=37º的斜面固定在水平面上。质量m=1.0kg的小
The bus was held up by the snowstorm,        the delay. A．causing   
根据所给的信息和标志，判断下列说法错误的是(   ) ABCD 《