单项选择题 ________is standing at the corner of the street．A.policeB.The policeC.PoliceD.A policeman

单项选择题 在端接安装中要尽量避免不必要的转弯，绝大多数的安装要求少于（ ）个90度转弯 A. 1 B. 2 C. 3 D. 4

单项选择题 Which of the following isn’t mentioned in the three advertisements?A.MarriagE.B.Male or femalE.C.EducationD.Working experiencE.