题目

已知 ， .“ ”是“ ”的必要条件，则实数a的取值范围是. 答案：【1】{a｜-1≤a≤5}阅读下面短文，从短文后各题所给的A、B、C和D四个选项中，选出最佳选项。 A girl used to turn her cell phone off and put it by her photo on the desk every night before going to bed. This habit has been with her ever since she the cellphone. The girl had a boyfriend .When they couldn’t ,they would either call or send messages to each other.They both liked the type of. One night the boy really the girl. When he called her, however ,the girl’s cell phone was off because she was already. The next day , the boy asked the girl to her cell- phone on at night, because when he needed to reach her and could not, he would be  From that day on ,the girl began a new. Her cell phone was never at night. Because she was afraid that she might not be able tothe phone ring in her sleep, she tried to very alert. As days went on, she became thinner and thinner. Slowly, a gap began tobetween them.  The girl wanted to revive their relationship. One night, she called the boy. However , what she got was a sweet female : ”Sorry, the subscriber you dialed is power off.” The girl knew that her had just been turned off.  After a long time, the girl had a new love. No matter how well they got along, the girl to get married . In the girl’s heart ,she always that boy’s words and the nightthat phone was power off. One night, the girl fell ill. calling her parents, she dialed the new boy’s cell phone.The boy was already asleep but his cell phone was still . Later the girl asked the boy, ”Why don’t you turn your cell phone off at night?”  The boy answered “I’m afraid that if you need anything at night and aren’t able to find me, you will be worried ”.The girl finally the boy. A.bought      B.used            C.had          D.left A. meet       B.work           C.eat           D.rest A.style       B.communication   C.emotion       D.habit liked        B.missed           C.hated         D.needed A.sleepy      B.tired             C.asleep        D.alone A.remain     B.expose           C.leave         D.take A.delighted   B.relieved          C.scared        D.worried A.friend      B.habit             C.career        D.hobby A.shut down  B.slowed down      C.broke  down  D.stepped down A.see        B.feel             C.smell          D.hear A.leave       B.take             C.stay          D.hold A.form      B.fill              C.work          D.discount A.person     B.voice            C.image         D.photo A.phone     B.power           C.love           D.fan A.pretended  B.agreed           C.decided        D.refused A. realized   B.understood        C.remembered    D.appreciated A.when      B.why             C.where         D.which A.Apart from   B.As a result of     C.In place of      D.Instead of A.on        B.off              C.away          D.in A.left       B.married          C.visited         D.received