【单选题】【消耗次数:1】
How stupid I have been! Why _______ I do that before?
don’t
didn’t
not
参考答案:
复制
纠错
相关题目
【单选题】 He didn’t have the book ____________ I wanted.
①  what
②  \
【判断题】 A: May I have your order now? B: No, I don’t have a choice of meat.
①  正确
②  错误
【单选题】 I don’t know why she avoids __________ her opinion on the subject.
①  to give
②  to be given
③  giving
④  being given
【单选题】 I didn’t mean to do that. Please forgive me.____________
①  Not too bad.
②  Never mind.
③  It’s a pleasure.
④  Thank you.
【单选题】 I didn’t know what to do, but then an idea suddenly ________ to me.
①  appeared
②  happened
③  occurred
④  emerged
【单选题】 I don’ t think it’ s important, _____?
①  doesn’ t
②  is it
③  do I
④  isn’ t
【单选题】 40.—I`m sorry I didn`t do a good job. ---Never mind.____you have tried your best.
①  Aboveall
②  Aboveall
③  Atall
④  Afterall
【单选题】 —Why didn’t you come to join her party? —I______, but I had to look after my ill mother.
①  would have
②  should
③  would do
④  was going to have
【单选题】 If you don’t go, ____ I.
①  nor shall
②  so don’t
③  neither do
④  so do
【单选题】 Why not buy a cheaper one, ___ you don’t have enough money?
①  since
②  because
③  for
④  though
随机题目
【单选题】 平面上有两个定点A、B及动点P,命题甲:“|PA|-|PB|是定值”,命题乙“点P的轨迹是以A、B为焦点的双曲线”,则甲是乙的(  )
①  充分不必要条件
②  必要不充分条件
③  充要条件
④  既不充分也不必要条件
【判断题】 确定属性时,可以把关联类的属性当作一般对象的属性。
①  正确
②  错误
【判断题】 对递归定义的数据结构不要使用递归定义的过程。
①  正确
②  错误
【单选题】 若关于x的一元二次方程kx2+4x+3=0有实数根,则k的非负整数值是( )
①  0,1
②  1
③  1,2
④  1,2,3
【简答题】 在编码中首先要考虑的是[填空]。
【单选题】 <img src=http://huaweicloudobs.ahjxjy.cn/89c114273768b1809a63e2c3a5ff73d7.jpg/>
①  1
②  2
③  3
④  4
【单选题】 <img src=http://huaweicloudobs.ahjxjy.cn/46253e2b84d95def46fae6304bec8843.jpg/>
①  <img src=http://huaweicloudobs.ahjxjy.cn/c81f49dd80f9b30b14e608b1ed4cd3fa.png/>
②  <img src=http://huaweicloudobs.ahjxjy.cn/5e3c758b0a6758de2046b1ac9a09ddba.png/>
③  <img src=http://huaweicloudobs.ahjxjy.cn/65496f195e3b7984add7d1aff43fa467.png/>
④  <img src=http://huaweicloudobs.ahjxjy.cn/f71d07f651dc1567b627fe217f392361.png/>
【单选题】 已知复数a+3i=4-bi,a,b∈R则a+b=(  )
①  1/4
②  1/2
③  1
④  2
【单选题】 等差数列{an}中,a3=2,a5=7,则a7=(  )
①  10
②  12
③  16
④  20
【单选题】 好的人-机交互子系统可以提高( )。
①  编码效率
②  维护效率
③  设计效率
④  用户工作效率