【单选题】【消耗次数:1】
14. I didn’thear the phone. I ______ asleep.
must be
must have been
should be
should have been
参考答案:
复制
纠错
相关题目
【单选题】 I didnt hear the phone. I________asleep.
①  must be
②  must have been
③  should be
④  should have been
【单选题】 —Who broke the window ? —Not me. It must have been ____ else.
①  someone
②  anyone
③  everybody
④  nobody
【单选题】 How stupid I have been! Why _______ I do that before?
①  don’t
②  didn’t
③  not
【单选题】 I hope ___ the little ___ I have been able to do has been of some use.
①  that; that
②  /; by which?
③  what; what
④  /; with which
【单选题】 I have been at home [填空]Sunday.
①  on
②  for
③  at
④  since
【单选题】 I have been looking forward to ____ from my parents.
①  :hear
②  :being heard
③  :be heard
④  :hearing
【单选题】 You should have put the milk into the icebox, I expect it ____ undrinkable.
①  became
②  had become
③  has become
④  becomes
【单选题】 I should think they have done it ________, to avoid paying you the money.
①  with purpose
②  on purpose
③  in purpose
④  to purpose
【单选题】 I often ______ the cooking for my family, but recently I have been too busy to do it.
①  will do
②  do
③  am doing
④  had done
【单选题】 The sandwhich course, [填空]I have been on for a week ,is really excellent.
①  which
②  that
③  whose
④  who
随机题目
【判断题】 联视威PNP C588网络摄像机的云台能够做水平最大280度、垂直最大80度的转动。
①  正确
②  错误
【判断题】 发送短信时,短信服务中心号码因地区和电信运行商的不同而不同。
①  正确
②  错误
【判断题】 电磁反向散射耦合是指发射出去的电磁波遇到目标后反射,同时携带目标信息,依据的是电磁波的空间传播规律,一般适用于高频、低频工作的远距离RFID系统。
①  正确
②  错误
【判断题】 声光报警器(又叫声光警号)是一种用在危险场所,通过声音和各种光来向人们发出示警信号的一种报警信号装置。
①  正确
②  错误
【判断题】 WG-8010 GPRS DTU的组装一般可以分为两步,第一步是天线及SIM卡安装,第二步是上电检测网络情况。
①  正确
②  错误
【判断题】 DHT11数字温湿度传感器是一款含有已校准数字信号输出的温湿度复合传感器。
①  正确
②  错误
【判断题】 PWM调光技术指的是通过改变输入的脉冲信号占空比来调制LED驱动芯片对功率场效应管的栅极控制信号,从而达到调节通过LED电流大小的目的。
①  正确
②  错误
【判断题】 现场监控区域中,监控模块多为嵌入式系统,负责完成数据的采集、处理和控制,任务相对单一、固定,但模块的数据处理能力和精度将影响整个系统的最终性能。
①  正确
②  错误
【判断题】 GPRS DTU是一种物联网无线数据终端,利用公用运营商网络GPRS网络(又称G网)为用户提供无线长距离数据传输功能。
①  正确
②  错误
【判断题】 电感耦合方式一般适合于低频,高频工作的近距离RFID系统,系统识别作用距离通常小于1m。
①  正确
②  错误