题目

已知集合A={0，1，2，3}，集合B={（x，y）|x∈A，y∈A，x≠y，x+y∈A}，则B中所含元素的个数为（） A . 3 B . 6 C . 8 D . 10 答案：C 完形填空 　　The trip to that city was eye-opening for everyone, and near its end, all the young people in our group began to reflect on what it had meant．We looked back on the first night we had arrived．We had all gone into the markets of the city 　　1　　 the young people could experience its energy．But what we actually saw simply 　　2　　 us all－the rundown houses, the children in rags, the people begging for money…Walking home, 　　3　　 under a low bridge, we came across entire families of homeless people seeking a bit of dry ground to sleep on 　　4　　 the night．We had to step over bodies as we found our way through the darkness． 　　The poverty was 　　5　　 than anything my young companions had ever imagined．Back in the hotel, an air of sadness settled over the group．Many 　　6　　 and cried．Spending time in this 　　7　　 moves a person to care about humanity． 　　That evening, our group spent hours talking about what we had seen．Gently, I encouraged everyone to talk about the difficult 　　8　　 that day's discoveries had inspired．Sitting together 　　9　　 a circle as everyone had a chance to speak, we all began to realize that 　　10　　 of us was alone in our struggle to cope with our reactions． 　　Based on my 　　11　　 in poverty-stricken areas, I suggested that 　　12　　 the emotions we had were painful, they could also be important in helping us to move forward．We all 　　13　　 that we had seen things that should never be allowed to happen．　　14　　, what could we do about it?Together, we began to brainstorm ways we could help to ease the suffering we had seen．As I encouraged group members to focus on 　　15　　 they could do, a sense of determination replaced the previous sadness, Instead of despair(绝望), these young people began to feel a call to action． (1) [　　] A． now that B． so that C． as if D． even if (2) [　　] A． puzzled B． annoyed C． embarrassed D． shocked (3) [　　] A． marching B． running C． passing D． moving (4) [　　] A． beyond B． with C． till D． for (5) [　　] A． stronger B． deeper C． worse D． less (6) [　　] A． gave up B． broke down C． set off D． held on (7) [　　] A． environment B． hotel C． house D． background (8) [　　] A． feelings B． decisions C． thoughts D． impressions (9) [　　] A． along B． around C． by D． in (10) [　　] A． neither B． either C． none D． each (11) [　　] A． experiences B． schedules C． data D． position (12) [　　] A． once B． while C． since D． unless (13) [　　] A． supposed B． advised C． confirmed D． agreed (14) [　　] A． Surely B． Rather C． Now D． Indeed (15) [　　] A． how B． where C． what D． when